What is the difference between flat washers and lock washers?

Flat washers are ideal for increasing surface area and distributing the applied force when tightening a fastener. They can be used on the fastener's bolt & nut sides, or used as spacers when using a bolt may not be appropriate. Lock washers produce tension during tightening to control the loosening of nuts. They are commonly used on the fastener's nut side for applications involving vibrations.

How to install a flat washer?

Place the flat washer between the threaded fastener (like a nut) and the screw / bolt head. Make sure that the washer presses against the fastener & other adjacent surfaces to form a tight connection. Press the fastener down to lock the grooves of a serrated washer with the grooves of the nut. Use a wrench or ratchet to tighten the nut / threaded fastener. Ensure that the teeth of a serrated washer are covered completely by the nut / fastener head, or that a split washer is slightly out of alignment. This indicates tension on the threaded fastener. Users may loosen the nut / threaded fastener to adjust the washer if it is not operating correctly.

How to remove a flat washer?

Simply remove the nut / threaded fastener that is holding the washer in place using a vice-grip or pipe wrench.Use a flat screwdriver to pry a lock washer off. When removing a split washer, the screwdriver head should be placed inside the split or beneath the washer and pushed. When removing a washer having teeth, the screwdriver head should be placed under a tooth and pushed up, repeating the procedure with more teeth if required. For other flat washer types, the screwdriver head can be placed below the washer and pushed up. The washer may break during removal, depending on the amount of pressure being applied.If the flat washer does not budge, use penetrating oil and repeat the previous step.Some flat washers can be used multiple times easily. Other washers (split lock) can be used only 1 or 2 times. Users should not reuse a split flat washer or other damaged washers. Do not use old washers in high-stress joint applications.

Flat Washers

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SUPER-STRUT -

AB241 Series Square Washer

Style	Model	Color	Finish	Material	Thickness	Width
A	AB241L-1/2EG	-	Electro-Galvanized	Steel	1/2"	1-9/16"	RFQ
B	AB241L-5/8EG	-	Electro-Galvanized	Steel	-	-	RFQ
B	AB241L-1/2	-	Gold Galvanized	Steel	1/2"	1-9/16"	RFQ
B	AB241L-1/4	-	Gold Galvanized	Steel	-	1-9/16"	RFQ
B	AB241L-1/4EG	-	Silver Galvanized	Steel	-	-	RFQ
B	AB241L-3/8	-	Gold Galvanized	Steel	3/8"	1-9/16"	RFQ
A	AB241L-3/8EG	-	Electro-Galvanized	Steel	3/8"	1-9/16"	RFQ
C	AB241L-5/16	-	Gold Galvanized	Steel	-	-	RFQ
B	AB241L-5/16EG	-	Electro-Galvanized	Steel	-	-	RFQ
B	AB241L-5/8	-	Gold Galvanized	Steel	-	-	RFQ
D	AB241-1/2-HDG	-	Hot-Dip Galvanized	Steel	1/4"	1-1/2"	RFQ
D	AB241-3/4	-	Gold Galvanized	Steel	1/4"	1-1/2"	RFQ
D	AB241-3/8-HDG	-	Hot-Dip Galvanized	Steel	3/16"	1-1/2"	RFQ
E	AB241-5/16	-	Gold Galvanized	Steel	1/8"	1-1/2"	RFQ
F	AB241-5/16GR	-	-	Steel	1/8"	-	RFQ
F	AB241-5/16SS	-	-	Stainless Steel	1/8"	-	RFQ
E	AB241-5/8	-	Gold Galvanized	Steel	1/8"	1-1/2"	RFQ
F	AB241-5/8SS316	-	-	Stainless Steel	1/4"	-	RFQ
E	AB241-1/2-GR	Green	-	Steel	1/4"	1-1/2"	RFQ
E	AB241-3/8-GR	Green	Urethane Powder	Steel	3/16"	1-1/2"	RFQ
E	AB241-3/8-WH	White	Urethane Powder	Steel	3/16"	1-1/2"	RFQ
E	AB241-1/2-WH	White	-	Steel	1/4"	1-1/2"	RFQ

FABORY -

Flat Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	System of Measurement	Thickness	Washer Inside Dia.	Washer Material Grade	Washer O.D.	Price (inc. GST)
A	B38157.112.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/8	Inch	0.165"	1 1/4"	Low Carbon	2 3/4"	SGD 801.22
B	B38157.087.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	7/8"	Inch	0.165"	15/16"	Low Carbon	2 1/4"	SGD 275.68
C	B38157.031.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	5/16"	Inch	0.083"	3/8"	Low Carbon	7/8"	SGD 789.30
D	B38157.037.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	3/8"	Inch	0.083"	7/16"	Low Carbon	1"	SGD 266.86
E	B38157.043.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	7/16"	Inch	0.083"	1/2"	Low Carbon	1 1/4"	SGD 979.43
F	B38157.050.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1/2"	Inch	0.109"	9/16"	Low Carbon	1 3/8"	SGD 230.14
G	B38157.056.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	9/16"	Inch	0.109"	5/8"	Low Carbon	1 15/32"	SGD 714.39
H	B38157.062.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	5/8"	Inch	0.134"	11/16"	Low Carbon	1 3/4"	SGD 463.90
I	B38157.075.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	3/4"	Inch	0.148"	13/16"	Low Carbon	2"	SGD 655.54
J	B38157.100.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1"	Inch	0.165"	1 1/16"	Low Carbon	2 1/2"	SGD 229.49
K	B38157.125.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/4	Inch	0.165"	1 3/8"	Low Carbon	3"	SGD 447.53
L	U38157.056.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	9/16"	Inch	0.109"	5/8"	-	1 15/32"	SGD 10.71
M	U38157.137.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 3/8	Inch	0.18"	1 1/2"	-	3 1/4"	SGD 15.48
N	B38157.137.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 3/8	Inch	0.18"	1 1/2"	Low Carbon	3 1/4"	SGD 637.56
O	B38157.150.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/2	Inch	0.18"	1 5/8"	Low Carbon	3 1/2"	SGD 264.71
P	B38157.025.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1/4"	Inch	0.065"	5/16"	Low Carbon	47/64"	SGD 532.77
Q	B55410.056.0001	Plain	Plain	9/16"	Inch	0.094"	5/8"	316	1 1/2"	SGD 1764.94
R	B55410.062.0001	Plain	Plain	5/8"	Inch	0.063"	21/32"	316	1 5/16"	SGD 899.99
S	B55410.062.0002	Plain	Plain	5/8"	Inch	0.078"	11/16"	316	1 1/2"	-	RFQ
T	B55410.062.0003	Plain	Plain	5/8"	Inch	0.109"	11/16"	316	1 3/4"	SGD 1725.04
U	B55410.050.0002	Plain	Plain	1/2"	Inch	0.063"	9/16"	316	1 1/4"	SGD 1329.37
V	B55410.050.0003	Plain	Plain	1/2"	Inch	0.094"	9/16"	316	1 3/8"	SGD 838.42
W	B55410.031.0001	Plain	Plain	5/16"	Inch	0.047"	11/32"	316	11/16"	SGD 935.41
X	B55205.150.0001	Plain	Plain	1 1/2	Inch	0.165"	1 5/8"	316	3"	SGD 708.16
Y	B55410.011.0001	Plain	Plain	#4	Inch	0.031"	1/8"	316	5/16"	SGD 12474.15

ACCURATE MANUFACTURED PRODUCTS GROUP -

Flat Washers

Style	Model	Fits Bolt Sizes	System of Measurement	Thickness	Thickness Tolerance	Washer Inside Dia.	Washer O.D.	Price (inc. GST)
A	WAS407#10	#10	Inch	0.046875"	+/-0.015"	7/32"	1/2"	SGD 16.51
A	WAS40712	1/2"	Inch	0.0625"	+/-0.015"	17/32"	1 1/16"	SGD 27.24
A	WAS40714	1/4"	Inch	0.0625"	+/-0.015"	9/32"	5/8"	SGD 23.61
A	WAS40738	3/8"	Inch	0.0625"	+/-0.015"	13/32"	13/16"	SGD 17.06
A	WAS40751	5/16"	Inch	0.0625"	+/-0.015"	11/32"	11/16"	SGD 16.51
A	WAS407M5	M5	Metric	1 mm	+/-0.10mm	5.3 mm	10 mm	SGD 20.63	RFQ
A	WAS407M6	M6	Metric	1.6 mm	+/-0.20mm	6.4 mm	12 mm	SGD 26.00	RFQ
A	WAS407M8	M8	Metric	1.6 mm	+/-0.20mm	8.4 mm	16 mm	SGD 28.40	RFQ
A	WAS407M10	M10	Metric	2 mm	+/-0.20mm	10.5 mm	20 mm	SGD 29.53
A	WAS407M12	M12	Metric	2.5 mm	+/-0.20mm	13.0 mm	24 mm	SGD 39.26	RFQ

TE-CO -

Washer Assemblies

Style	Model	Color	Fits Bolt Sizes	Inside Dia.	Material	Outside Dia.	Rockwell Hardness	Size	Thickness	Price (inc. GST)
A	42702	Black	5/16, 3/8"	13/32"	Steel	7/8"	85 to 90 on 15N Scale	-	1/4"	SGD 4.73
B	42703	Black	7/16, 1/2"	17/32"	Steel	1.125"	85 to 90 on 15N Scale	-	5/16	SGD 7.21
C	42704	Black	5/8"	21/32"	Steel	1.375"	85 to 90 on 15N Scale	5/8"	5/16	SGD 9.06
D	42705	Black	3/4"	25/32"	Steel	1.625"	85 to 90 on 15N Scale	3/4"	3/8"	SGD 12.02
E	42706	Black	7/8"	15/16"	Steel	1.75"	85 to 90 on 15N Scale	7/8"	3/8"	SGD 16.08
F	42707	Black	1"	1-1/16"	Steel	2"	85 to 90 on 15N Scale	1"	1/2"	SGD 17.25
G	42708	Black	1.125"	1.200"	Steel	2.25"	85 to 90 on 15N Scale	1 1/8"	1/2"	SGD 32.07
H	42710	Black	1.5"	1.500"	Steel	2.875"	85 to 90 on 15N Scale	1 1/2 Lbs.	1/2"	SGD 55.65
I	47702	Plain	3/8"	13/32"	303 Stainless Steel	7/8"	27 on 15N Scale	3/8"	1/4"	SGD 20.77
J	47705	Plain	3/4"	25/32"	303 Stainless Steel	1.625"	27 on 15N Scale	3/4"	3/8"	SGD 42.79

TE-CO -

Flat Washers, Black Oxide

Style	Model	Fits Bolt Sizes	Inside Dia.	Item	Material	Outside Dia.	Size	Thickness	Price (inc. GST)
A	42612	#4	1/8"	Flat Washer	Steel	5/16"	-	5/64	SGD 0.10
B	42614	#8	3/16"	Flat Washer	Steel	7/16"	-	5/64	SGD 0.04
C	42600	#10	13/64"	Flat Washer	Steel	1/2"	-	3/32"	-	RFQ
D	42609	1"	1"	Flat Washer	Steel	2"	1"	3/16"	SGD 23.19
E	42627	1"	1.030"	Heavy Duty Washer	Hardened Steel	2"	1"	9/32"	-	RFQ
F	42611	1.25"	1.300"	Flat Washer	Steel	2.5"	1 1/4 Lbs.	9/32"	-	RFQ
G	42610	1.125"	1"	Flat Washer	Steel	2.25"	1 1/8"	7/32"	-	RFQ
H	42605	1/2"	17/32"	Flat Washer	Steel	1.125"	1/2"	1/8"	SGD 22.35
I	42619	1/4"	9/32"	Heavy Duty Washer	Hardened Steel	5/8"	1/4"	3/16"	SGD 0.19
J	42607	3/4"	25/32"	Flat Washer	Steel	1.625"	3/4"	5/32	SGD 2.22
K	42621	3/8"	13/32"	Heavy Duty Washer	Hardened Steel	7/8"	3/8"	3/16"	-	RFQ
L	42620	5/16"	11/32"	Heavy Duty Washer	Hardened Steel	3/4"	5/16"	3/16"	SGD 22.11
M	42626	7/8"	29/32"	Heavy Duty Washer	Hardened Steel	1.75"	7/8"	1/4"	-	RFQ
N	42604	7/16"	15/32"	Flat Washer	Steel	1"	7/16"	1/8"	SGD 0.17

DYNAFORM -

Nylon Flat Washers

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Size	Thickness	Price (inc. GST)
A	874340	1/2"	1/2"	3/4"	1/2"	0.058"	SGD 3.82
B	874350	3/4"	3/4"	1"	3/4"	0.063"	SGD 4.06

FABORY -

Plain Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	Thickness	Washer Inside Dia.	Washer Material Grade	Washer O.D.	Price (inc. GST)
A	L51532.060.0001	Plain	Plain	M6	3 mm	6.4 mm	A2	17 mm	SGD 830.14
A	L55420.070.0001	Plain	Plain	M7	1.6 mm	7.4 mm	A4	14 mm	SGD 1119.60
A	L51532.080.0001	Plain	Plain	M8	4 mm	8.4 mm	A2	21 mm	-	RFQ
A	L51532.100.0001	Plain	Plain	M10	4 mm	10.5 mm	A2	25 mm	SGD 933.05
A	L51532.120.0001	Plain	Plain	M12	6 mm	13.0 mm	A2	30 mm	SGD 624.05
A	L38250.140.0001	Zinc Plated	Zinc Plated	M14	2.5 mm	15.0 mm	Low Carbon	24 mm	SGD 1022.52
A	L38430.030.0001	Zinc Plated	Zinc Plated	M3	1 mm	3.2 mm	Low Carbon	9 mm	SGD 1135.49
A	L38250.100.0001	Zinc Plated	Zinc Plated	M10	1.6 mm	10.5 mm	Low Carbon	18 mm	SGD 1505.74
A	L38250.080.0001	Zinc Plated	Zinc Plated	M8	1.6 mm	8.4 mm	Low Carbon	15 mm	SGD 900.96
A	L38250.040.0001	Zinc Plated	Zinc Plated	M4	0.5 mm	4.3 mm	Low Carbon	8 mm	SGD 1109.02
A	L38430.270.0001	Zinc Plated	Zinc Plated	M27	1 mm	28.0 mm	Low Carbon	60 mm	SGD 1232.55
A	L38430.220.0001	Zinc Plated	Zinc Plated	M22	8 mm	23.0 mm	Low Carbon	50 mm	SGD 1922.33
A	L38430.120.0001	Zinc Plated	Zinc Plated	M12	6 mm	13.0 mm	Low Carbon	30 mm	SGD 1229.90
A	L38430.080.0001	Zinc Plated	Zinc Plated	M8	4 mm	8.4 mm	Low Carbon	21 mm	SGD 1264.80
A	L38430.050.0001	Zinc Plated	Zinc Plated	M5	2 mm	5.3 mm	Low Carbon	15 mm	SGD 1499.68
A	L38250.030.0001	Zinc Plated	Zinc Plated	M3	0.5 mm	3.2 mm	Low Carbon	6 mm	SGD 2462.88
A	L38250.060.0001	Zinc Plated	Zinc Plated	M6	1.6 mm	6.4 mm	Low Carbon	11 mm	SGD 662.34
A	L38250.160.0001	Zinc Plated	Zinc Plated	M16	2.5 mm	17.0 mm	Low Carbon	28 mm	SGD 546.26
A	L38250.020.0001	Zinc Plated	Zinc Plated	M2	0.3 mm	2.2 mm	Low Carbon	4 1/2 mm	SGD 2694.57
A	L38430.300.0001	Zinc Plated	Zinc Plated	M30	1 mm	31.0 mm	Low Carbon	68 mm	SGD 529.97
A	L38430.240.0001	Zinc Plated	Zinc Plated	M24	1 mm	25.0 mm	Low Carbon	50 mm	SGD 1419.78
A	L38430.160.0001	Zinc Plated	Zinc Plated	M16	6 mm	17.0 mm	Low Carbon	40 mm	SGD 460.08
A	L38430.100.0001	Zinc Plated	Zinc Plated	M10	4 mm	10.5 mm	Low Carbon	25 mm	SGD 713.81
A	L38430.060.0001	Zinc Plated	Zinc Plated	M6	3 mm	6.4 mm	Low Carbon	17 mm	SGD 1504.58
A	L38430.040.0001	Zinc Plated	Zinc Plated	M4	1.6 mm	4.3 mm	Low Carbon	12 mm	SGD 1856.72

FABORY -

SAE Washers

Style	Model	Fits Bolt Sizes	Thickness	Washer Inside Dia.	Washer O.D.	Price (inc. GST)
A	U38206.150.0001	1 1/2	0.165"	1 5/8"	3"	SGD 14.17
A	B38206.150.0001	1 1/2	0.165"	1 5/8"	3"	SGD 324.52
A	B38206.125.0001	1 1/4	0.165"	1 3/8"	2 1/2"	SGD 390.16
A	U38206.125.0001	1 1/4	0.165"	1 3/8"	2 1/2"	SGD 10.83
A	B38206.112.0001	1 1/8	0.134"	1 1/4"	2 1/4"	SGD 420.09
A	U38206.112.0001	1 1/8	0.134"	1 1/4"	2 1/4"	SGD 7.57
A	B38206.137.0001	1 3/8	0.165"	1 1/2"	2 3/4"	SGD 356.34
A	U38206.137.0001	1 3/8	0.165"	1 1/2"	2 3/4"	SGD 10.27
A	U38206.100.0001	1"	0.134"	1 1/16"	2"	SGD 5.49
A	B38206.100.0001	1"	0.134"	1 1/16"	2"	SGD 375.39
A	B38206.050.0001	1/2"	0.095"	17/32"	1 1/16"	SGD 342.98
A	U38206.050.0001	1/2"	0.095"	17/32"	1 1/16"	SGD 12.90
A	B38206.025.0001	1/4"	0.065"	9/32"	5/8"	SGD 492.63
A	U38206.025.0001	1/4"	0.065"	9/32"	5/8"	SGD 6.66
A	B38206.075.0001	3/4"	0.134"	13/16"	1 15/32"	SGD 386.58
A	U38206.075.0001	3/4"	0.134"	13/16"	1 15/32"	SGD 10.44
A	U38206.037.0001	3/8"	0.065"	13/32"	13/16"	SGD 10.66
A	B38206.037.0001	3/8"	0.065"	13/32"	13/16"	SGD 435.32
A	U38206.062.0001	5/8"	0.095"	21/32"	1 5/16"	SGD 10.58
A	B38206.062.0001	5/8"	0.095"	21/32"	1 5/16"	SGD 396.44
A	B38206.031.0001	5/16"	0.065"	11/32"	11/16"	SGD 443.50
A	U38206.031.0001	5/16"	0.065"	11/32"	11/16"	SGD 8.29
A	B38206.087.0001	7/8"	0.134"	15/16"	1 3/4"	SGD 365.09
A	U38206.087.0001	7/8"	0.134"	15/16"	1 3/4"	SGD 8.43
A	B38206.043.0001	7/16"	0.065"	15/32"	59/64"	SGD 423.48

FABORY -

Fender Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	Thickness	Thickness Tolerance	Washer Inside Dia.	Washer Material Grade	Washer O.D.	Price (inc. GST)
A	B38213.037.0200	Plain	Plain	3/8"	0.0625"	+0.08" /-0.047"	13/32"	Low Carbon	2"	SGD 752.42
A	B38213.031.0162	Plain	Plain	5/16"	0.0625"	+0.08" /-0.047"	11/32"	Low Carbon	1 5/8"	SGD 734.72
B	B55530.018.0050	Plain	Plain	3/16"	0.065"	0.047" to 0.080"	3/16"	316	1/2"	SGD 3633.91
A	B51530.012.0062	Plain	Plain	1/8"	0.065"	0.047" to 0.080"	5/32"	18-8	5/8"	SGD 3362.02
B	B55530.012.0075	Plain	Plain	1/8"	0.065"	0.047" to 0.080"	5/32"	316	3/4"	SGD 1625.33
A	B38213.050.0200	Plain	Plain	1/2"	0.0625"	+0.08" /-0.047"	17/32"	Low Carbon	2"	SGD 4034.36
A	B51530.050.0300	Plain	Plain	1/2"	0.065"	0.047" to 0.080"	1/2"	18-8	3"	SGD 774.77
A	B38213.037.0300	Plain	Plain	3/8"	0.0625"	+0.08" /-0.047"	13/32"	Low Carbon	3"	SGD 444.76
B	B51530.050.0200	Plain	Plain	1/2"	0.065"	0.047" to 0.080"	17/32"	18-8	2"	SGD 658.07
A	B38213.037.0162	Plain	Plain	3/8"	0.0625"	+0.08" /-0.047"	13/32"	Low Carbon	1 5/8"	SGD 917.79
A	B38213.037.0150	Plain	Plain	3/8"	0.0625"	+0.08" /-0.047"	13/32"	Low Carbon	1 1/2"	SGD 7627.52
A	B38213.037.0125	Plain	Plain	3/8"	0.0625"	+0.08" /-0.047"	13/32"	Low Carbon	1 1/4"	SGD 14217.90
A	B38213.031.0300	Plain	Plain	5/16"	0.0625"	+0.08" /-0.047"	11/32"	Low Carbon	3"	SGD 443.04
A	B38213.031.0250	Plain	Plain	5/16"	0.0625"	+0.08" /-0.047"	11/32"	Low Carbon	2 1/2"	SGD 560.48
A	B38213.031.0200	Plain	Plain	5/16"	0.0625"	+0.08" /-0.047"	11/32"	Low Carbon	2"	SGD 581.46
A	B38213.031.0150	Plain	Plain	5/16"	0.0625"	+0.08" /-0.047"	11/32"	Low Carbon	1 1/2"	SGD 7317.84
B	B55530.018.0100	Plain	Plain	3/16"	0.065"	0.047" to 0.080"	3/16"	316	1"	SGD 1166.04
A	B38213.031.0125	Plain	Plain	5/16"	0.0625"	+0.08" /-0.047"	11/32"	Low Carbon	1 1/4"	SGD 10442.00
A	B38213.025.0300	Plain	Plain	1/4"	0.0625"	+0.08" /-0.047"	9/32"	Low Carbon	3"	-	RFQ
A	B38213.025.0250	Plain	Plain	1/4"	0.0625"	+0.08" /-0.047"	9/32"	Low Carbon	2 1/2"	SGD 500.13
A	B38213.025.0200	Plain	Plain	1/4"	0.0625"	+0.08" /-0.047"	9/32"	Low Carbon	2"	SGD 395.19
A	B38213.025.0150	Plain	Plain	1/4"	0.0625"	+0.08" /-0.047"	9/32"	Low Carbon	1 1/2"	SGD 5646.03
A	B38213.025.0125	Plain	Plain	1/4"	0.0625"	+0.08" /-0.047"	9/32"	Low Carbon	1 1/4"	SGD 300.27
A	B38213.025.0100	Plain	Plain	1/4"	0.0625"	+0.08" /-0.047"	9/32"	Low Carbon	1"	SGD 305.74
A	B38213.025.0087	Plain	Plain	1/4"	0.0625"	+0.08" /-0.047"	9/32"	Low Carbon	7/8"	SGD 1905.63

FABORY -

USS Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	Thickness	Washer Inside Dia.	Washer Material Grade	Washer O.D.	Price (inc. GST)
A	B55420.075.0001	Plain	Plain	3/4"	0.140625"	13/16"	316	2"	SGD 1090.92
A	U55420.075.0001	Plain	Plain	3/4"	0.148"	13/16"	316	2"	SGD 80.71
A	B38131.037.0001	Zinc Yellow	Zinc Yellow	3/8"	0.083"	7/16"	Through Hardened	1"	SGD 367.31
A	B38131.056.0001	Zinc Yellow	Zinc Yellow	9/16"	0.109"	5/8"	Through Hardened	1 15/32"	SGD 323.95
A	U38131.150.0001	Zinc Yellow	Zinc Yellow	1 1/2	0.18"	1 5/8"	Through Hardened	3 1/2"	SGD 19.18
A	U38131.137.0001	Zinc Yellow	Zinc Yellow	1 3/8	0.18"	1 1/2"	Through Hardened	3 1/4"	SGD 17.44
A	U38131.125.0001	Zinc Yellow	Zinc Yellow	1 1/4	0.165"	1 3/8"	Through Hardened	3"	SGD 13.21
A	U38131.112.0001	Zinc Yellow	Zinc Yellow	1 1/8	0.165"	1 1/4"	Through Hardened	2 3/4"	SGD 12.62
A	U38131.100.0001	Zinc Yellow	Zinc Yellow	1"	0.165"	1 1/16"	Through Hardened	2 1/2"	SGD 13.50
A	U38131.087.0001	Zinc Yellow	Zinc Yellow	7/8"	0.165"	15/16"	Through Hardened	2 1/4"	SGD 13.21
A	B38131.150.0001	Zinc Yellow	Zinc Yellow	1 1/2	0.18"	1 5/8"	Through Hardened	3 1/2"	SGD 329.91
A	B38131.125.0001	Zinc Yellow	Zinc Yellow	1 1/4	0.165"	1 3/8"	Through Hardened	3"	SGD 331.19
A	B38131.100.0001	Zinc Yellow	Zinc Yellow	1"	0.165"	1 1/16"	Through Hardened	2 1/2"	SGD 375.55
A	B38131.075.0001	Zinc Yellow	Zinc Yellow	3/4"	0.148"	13/16"	Through Hardened	2"	SGD 725.26
A	B38131.031.0001	Zinc Yellow	Zinc Yellow	5/16"	0.083"	3/8"	Through Hardened	7/8"	SGD 295.10
A	B38131.043.0001	Zinc Yellow	Zinc Yellow	7/16"	0.083"	1/2"	Through Hardened	1 1/4"	SGD 390.08
A	B38131.050.0001	Zinc Yellow	Zinc Yellow	1/2"	0.109"	9/16"	Through Hardened	1 3/8"	SGD 226.21
A	U38131.075.0001	Zinc Yellow	Zinc Yellow	3/4"	0.148"	13/16"	Through Hardened	2"	SGD 22.87
A	U38131.056.0001	Zinc Yellow	Zinc Yellow	9/16"	0.109"	5/8"	Through Hardened	1 15/32"	SGD 10.01
A	U38131.050.0001	Zinc Yellow	Zinc Yellow	1/2"	0.109"	9/16"	Through Hardened	1 3/8"	SGD 20.28
A	U38131.043.0001	Zinc Yellow	Zinc Yellow	7/16"	0.083"	1/2"	Through Hardened	1 1/4"	SGD 14.88
A	U38131.037.0001	Zinc Yellow	Zinc Yellow	3/8"	0.083"	7/16"	Through Hardened	1"	SGD 16.73
A	U38131.031.0001	Zinc Yellow	Zinc Yellow	5/16"	0.083"	3/8"	Through Hardened	7/8"	SGD 14.39
A	U38131.025.0001	Zinc Yellow	Zinc Yellow	1/4"	0.065"	5/16"	Through Hardened	47/64"	SGD 10.78
A	B38131.137.0001	Zinc Yellow	Zinc Yellow	1 3/8	0.18"	1 1/2"	Through Hardened	3 1/4"	SGD 313.89

FABORY -

Flat Steel Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	Thickness	Washer Inside Dia.	Washer O.D.	Price (inc. GST)
A	B04237.062.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	5/8"	0.122" to 0.177"	5/8"	1 5/16"	SGD 375.13
A	B04237.050.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1/2"	0.097" to 0.177"	1/2"	1 1/16"	SGD 398.42
A	B04237.087.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	7/8"	0.136" to 0.177"	7/8"	1 3/4"	SGD 365.18
A	B04237.112.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/8	0.136" to 0.177"	1 1/8"	2 1/4"	SGD 394.24
A	B04237.075.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	3/4"	0.122" to 0.177"	3/4"	1 15/32"	SGD 436.50
A	B04237.100.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1"	0.136" to 0.177"	1"	2"	SGD 341.48
A	B04237.125.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/4	0.136" to 0.177"	1 1/4"	2 1/2"	SGD 393.93
A	B04035.050.0001	Plain	Plain	1/2"	0.097" to 0.177"	1/2"	1 1/16"	SGD 392.37
A	B04035.062.0001	Plain	Plain	5/8"	0.122" to 0.177"	5/8"	1 5/16"	-	RFQ
A	B04035.087.0001	Plain	Plain	7/8"	0.136" to 0.177"	7/8"	1 3/4"	SGD 309.83
A	B04035.112.0001	Plain	Plain	1 1/8	0.136" to 0.177"	1 1/8"	2 1/4"	SGD 335.37
A	B04035.125.0001	Plain	Plain	1 1/4	0.136" to 0.177"	1 1/4"	2 1/2"	SGD 335.68
A	B04035.075.0001	Plain	Plain	3/4"	0.122" to 0.177"	3/4"	1 15/32"	SGD 372.44
A	B04035.100.0001	Plain	Plain	1"	0.136" to 0.177"	1"	2"	-	RFQ

UNISTRUT -

Flat Washer

Style	Model	Size	Price (inc. GST)
A	HFLW050-EG	1/2"	-	RFQ
A	HFLW025-EG	1/4"	-	RFQ
B	HFLW075-EG	3/4"	-	RFQ
A	HFLW037-EG	3/8"	SGD 2.53	RFQ
B	HFLW062-EG	5/8"	-	RFQ
A	HFLW031-EG	5/16"	-	RFQ

SUPER-STRUT -

ZE147 Series Flat Washer

Style	Model	Finish	Inside Dia.	Thickness
A	ZE147-1/4EG	Electro-Galvanized	5/16"	0.08"	RFQ
A	ZE147-3/8EG	Gold Galvanized	3/8"	0.104"	RFQ

SUPER-STRUT -

EF147 Series Flat Washer

Style	Model	Finish	Inside Dia.	Material	Outside Dia.	Thickness
A	EF147-1/4SS316	-	5/16"	Stainless Steel	1 1/4"	-	RFQ
A	EF147-1/2SS316	-	17/32"	Stainless Steel	2"	0.051"	RFQ
A	EF147-3/8ATT	-	-	-	-	-	RFQ
A	EF147-3/8EG	Electro-Galvanized	-	Steel	1 1/2"	-	RFQ
A	EF147-1/4EG	Electro-Galvanized	-	Steel	1 1/4"	-	RFQ
A	EF147-1/2EG	Electro-Galvanized	-	Steel	2"	-	RFQ
A	EF147-3/8	Gold Galvanized	13/32"	Steel	1 1/2"	0.08"	RFQ
A	EF147-1/2	Gold Galvanized	-	Steel	2"	-	RFQ
A	EF147-1/4	Gold Galvanized	5/16"	Steel	1 1/4"	-	RFQ

SUPER-STRUT -

E147 Series Flat Washer

Style	Model	Color	Finish	Inside Dia.	Material	Outside Dia.	Thickness	Price (inc. GST)
A	E147-3/8SS	-	-	0.438"	Stainless Steel	1"	0.104"	-	RFQ
A	E147-1/4SS6	-	-	1/4"	Stainless Steel	-	-	-	RFQ
A	E147-1/2SS6	-	-	1/2"	Stainless Steel	-	-	-	RFQ
B	E147-1/4	-	Gold Galvanized	-	Steel	-	-	-	RFQ
A	E147-3/8SS6	-	-	0.438"	Stainless Steel	1"	0.104"	-	RFQ
A	E147-1/2-SS	-	-	0.562"	Stainless Steel	1.375"	0.132"	-	RFQ
B	E147-1/2	-	Gold Galvanized	0.562"	Steel	1.375"	0.132"	-	RFQ
C	E147 3/8	Gold	Gold Galvanized	-	Steel	-	1/4"	SGD 79.42
A	E147-5/16SS6	Silver	-	0.375"	Stainless Steel	0.875"	0.104"	-	RFQ
B	E147-5/8	Silver	Electro-Galvanized	0.688"	Steel	1.75"	0.16"	-	RFQ
B	E147-5/16	Silver	Electro-Galvanized	0.375"	Steel	0.875"	0.104"	-	RFQ
A	E147-5/8EG	Silver	Electro-Galvanized	0.688"	Steel	1.75"	0.16"	-	RFQ
A	E147-1/4SS	Silver	-	0.312"	Stainless Steel	0.734"	0.8"	-	RFQ
B	E147-7/8	Silver	Electro-Galvanized	0.938"	Steel	2.25"	0.192"	-	RFQ
B	E147-3/4	Silver	Electro-Galvanized	0.812"	Steel	2"	0.177"	-	RFQ

SUPER-STRUT -

C781 Series Square Washer

Style	Model	Finish	Material	Width
A	C-781-1/2-SS	-	Stainless Steel	3"	RFQ
A	C781-5/8SS6	-	Stainless Steel	3"	RFQ
A	C781-1/2B	Black	Steel	-	RFQ
A	C781-1B	Black	Steel	4"	RFQ
A	C781-3/4B	Black	Steel	-	RFQ
A	C781-3/8B	Black	Steel	-	RFQ
A	C781-1/2-EG	Electro-Galvanized	Steel	-	RFQ
A	C781-5/8EG	Electro-Galvanized	Steel	3"	RFQ
A	C781-3/8EG	Electro-Galvanized	Steel	-	RFQ

ARMOR COAT -

Flat Washers

Style	Model	Fits Bolt Sizes	Inside Dia.	Item	Outside Dia.	Size	Thickness	Type	Price (inc. GST)
A	UST236043	1/2"	17/32"	SAE Washer	1 1/16"	1/2"	7/64"	SAE	SGD 8.15
B	UST237823	1/2"	9/16"	USS Washer	1.375"	1/2"	1/8"	USS	SGD 16.20
C	UST236039	1/4"	9/32"	SAE Washer	5/8"	1/4"	5/64"	SAE	SGD 13.95
D	UST237819	1/4"	5/16"	USS Washer	3/4"	1/4"	5/64"	USS	SGD 19.73
E	UST236045	3/4"	13/16"	SAE Washer	1 15/32"	3/4"	9/64"	SAE	SGD 10.16
F	UST237825	3/4"	13/16"	USS Washer	2"	3/4"	5/32"	USS	SGD 31.45
G	UST236041	3/8"	13/32"	SAE Washer	13/16"	3/8"	3/32"	SAE	SGD 9.89
H	UST237821	3/8"	7/16"	USS Washer	1"	3/8"	3/32"	USS	SGD 13.19
I	UST236044	5/8"	11/16"	SAE Washer	1 5/16"	5/8"	1/8"	SAE	SGD 12.83
J	UST237824	5/8"	21/32"	USS Washer	1.75"	5/8"	5/32"	USS	SGD 26.52
K	UST236040	5/16"	11/32"	SAE Washer	11/16"	5/16"	3/32"	SAE	SGD 6.76
L	UST237820	5/16"	3/8"	USS Washer	7/8"	5/16"	3/32"	USS	SGD 10.61
M	UST236042	7/16"	15/32"	SAE Washer	59/64"	7/16"	3/32"	SAE	SGD 6.28
N	UST237822	7/16"	1/2"	USS Washer	1.25"	7/16"	3/32"	USS	SGD 11.18

APPROVED VENDOR -

Flat Washer Thick Stainless Steel

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Price (inc. GST)
A	U51410.006.0001	#0	1/16"	1/8"	0.016"	SGD 37.30
B	U51410.007.0001	#1	3/32"	5/32"	0.016"	SGD 33.59
C	U51410.008.0001	#2	3/32"	3/16"	0.031"	SGD 32.97
D	U51410.011.0003	#4	1/8"	5/16"	0.078"	SGD 68.28
E	U51410.011.0001	#4	1/8"	1/4"	0.063"	SGD 119.18
F	U51410.013.0002	#6	5/32"	5/16"	0.063"	SGD 57.47
G	U51410.013.0004	#6	5/32"	3/8"	0.078"	SGD 59.38
H	U51410.016.0003	#8	3/16"	7/16"	0.078"	SGD 47.02
I	U51410.016.0001	#8	5/32"	3/8"	0.063"	SGD 22.43
J	U51410.019.0001	#10	3/16"	1/2"	0.094"	SGD 7.09
K	U51410.100.0001	1"	1.031"	2"	0.188"	SGD 16.68
L	U51410.050.0003	1/2"	17/32"	1.125"	0.125"	SGD 17.28
M	U51410.025.0003	1/4"	9/32"	5/8"	0.125"	SGD 9.06
N	U51410.025.0001	1/4"	9/32"	1/2"	0.078"	SGD 78.94
O	U51410.075.0003	3/4"	25/32"	1.625"	0.125"	SGD 27.74
P	U51410.037.0004	3/8"	13/32"	7/8"	0.125"	SGD 20.43
Q	U51410.037.0002	3/8"	13/32"	3/4"	0.094"	SGD 9.89
R	U51410.062.0003	5/8"	61/93"	1.375"	0.125"	SGD 24.06
S	U51410.031.0006	5/16"	11/32"	3/4"	0.125"	SGD 11.94
T	U51410.031.0003	5/16"	11/32"	11/16"	0.094"	SGD 313.24
U	U51410.031.0001	5/16"	11/32"	5/8"	0.094"	SGD 8.03
V	U51410.031.0005	5/16"	11/32"	3/4"	0.094"	SGD 10.11
W	U51410.043.0003	7/16"	15/32"	1"	0.125"	SGD 20.81

APPROVED VENDOR -

Flat Washer Wide Stainless Steel

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Price (inc. GST)
A	U51420.100.0001	1"	1-1/16"	2.5"	0.165"	SGD 18.40
B	U51420.150.0001	1.5"	1.625"	3.5"	0.18"	SGD 34.07
C	U51420.125.0001	1.25"	1.375"	3"	0.165"	SGD 156.88
D	U51420.112.0001	1.125"	1.25"	2.75"	0.165"	SGD 15.48
E	U51420.056.0001	9/16"	5/8"	1 15/32"	0.109"	SGD 20.43

APPROVED VENDOR -

Flat Washer, Stainless Steel

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Price (inc. GST)
A	U51410.100.0005	1"	1-1/16"	2.5"	0.141"	SGD 162.95
B	U51410.075.0007	3/4"	25/32"	2"	0.125"	SGD 42.67
C	U51410.087.0003	7/8"	15/16"	2"	0.094"	SGD 7.26
D	U51410.087.0004	7/8"	15/16"	2"	0.109"	SGD 7.76
E	U51410.087.0005	7/8"	15/16"	2.25"	0.141"	SGD 38.47

BURNDY -

Durium Series Flat Washer

Style	Model	Bolt Size	Inside Dia.
A	50FWBOX	1-1/16"	1/2"	RFQ
B	25FWBOX	1/4"	1/4"	RFQ
A	38FWBOX	3/8"	0.421"	SGD 2.06	RFQ

12...6 7

Flat Washers

Flat washers are used with threaded fasteners for distributing the load uniformly and reducing frictional losses during screw tightening. These units are used for providing spacing and electrical insulation in control boxes. Raptor Supplies offers a wide array of flat washers from Accurate Mfd Products, Apollo, Armor Coat, C. Sherman Johnson, Dynaform, Earnest, Fabory, Foreverbolt, Grainger, Master Products, Metric Blue, TE-CO and Micro Plastics.

Features

Flat washers are designed to decrease friction, stop leakage, prevent loosening and reduce the distribution of pressure.
They enhance the size of a screw's bearing surface and decrease the surface pressure applied to the fastened object.
These washers secure surfaces by evenly distributing torque when a bolt or screw is tightened.
They eliminate corrosion between a steel screw and an aluminium surface.

Categories

Brands

Flat Washers

AB241 Series Square Washer

Flat Washers

Flat Washers

Washer Assemblies

Flat Washers, Black Oxide

Nylon Flat Washers

Plain Washers

SAE Washers

Fender Washers

USS Washers

Flat Steel Washers

Flat Washer

ZE147 Series Flat Washer

EF147 Series Flat Washer

E147 Series Flat Washer

C781 Series Square Washer

Flat Washers

Flat Washer Thick Stainless Steel

Flat Washer Wide Stainless Steel

Flat Washer, Stainless Steel

Durium Series Flat Washer

Flat Washers

Features

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