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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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...Read more

THOMAS & BETTS -

Piercing Washers

Style	Model	Price (ex. VAT)
A	RJ757	€13.58	RFQ
A	RJ9711	€12.82	RFQ
A	RJ9731	€12.82	RFQ
A	RJ9751	€13.58	RFQ
B	RM9731	€22.17	RFQ

ANVIL -

Flat Washers

Style	Model	Price (ex. VAT)
A	0500364708	€1.82	RFQ
A	0500364674	€0.29	RFQ
A	0500364690	€0.84	RFQ
A	0500364716	€3.04	RFQ
A	FIG AS 209	-	RFQ
A	0500364682	€0.49	RFQ

L9 -

Flat Washers

Style	Model	Fits Bolt Sizes	Thickness	Thickness Tolerance	Washer Inside Dia.	Washer O.D.	Price (ex. VAT)
A	448026	1 1/2	0.25"	+/-0.016"	1 9/16"	1"	€274.40	RFQ
A	447026	1 1/2	0.203125"	+/-0.016"	1 41/64"	1"	€698.47	RFQ
A	448024	1 1/4	0.25"	+/-0.016"	1 5/16"	1"	€228.96	RFQ
A	447024	1 1/4	0.182"	+/-0.016"	1 25/64"	1"	€534.55	RFQ
A	447022	1 1/8	0.182"	+/-0.014"	1 17/64"	2 3/4"	€805.38	RFQ
A	448022	1 1/8	0.16"	+/-0.014"	1 3/16"	1"	€326.07	RFQ
A	447020	1"	0.162"	+/-0.014"	1 3/32"	2 1/2"	€292.22	RFQ
A	448020	1"	0.16"	+/-0.014"	1 1/16"	2 1/32"	€223.62	RFQ
A	448010	1/2"	0.109375"	+/-0.011"	17/32"	1 3/4"	€130.07	RFQ
A	447010	1/2"	0.140625"	+/-0.011"	17/32"	1 3/8"	€180.85	RFQ
A	447002	1/4"	0.078125"	+/-0.008"	17/64"	1"	€77.06	RFQ
A	448002	1/4"	0.063"	+/-0.008"	9/32"	5/8"	€66.37	RFQ
A	448016	3/4"	0.16"	+/-0.014"	13/16"	1 31/64"	€224.51	RFQ
A	447016	3/4"	0.162"	+/-0.014"	25/32"	2"	€370.62	RFQ
A	448006	3/8"	0.109375"	+/-0.011"	27/64"	13/16"	€105.13	RFQ
A	447006	3/8"	0.086"	+/-0.011"	13/32"	1"	€135.42	RFQ
A	447014	5/8"	0.162"	+/-0.014"	41/64"	1 3/4"	€354.58	RFQ
A	448014	5/8"	0.16"	+/-0.014"	21/32"	1"	€225.40	RFQ
A	448004	5/16"	0.063"	+/-0.008"	11/32"	11/16"	€83.75	RFQ
A	447004	5/16"	0.086"	+/-0.008"	11/32"	7/8"	€105.13	RFQ
A	447018	7/8"	0.162"	+/-0.014"	15/16"	2 1/4"	€392.00	RFQ
A	448018	7/8"	0.16"	+/-0.014"	15/16"	1 49/64"	€261.04	RFQ
A	448008	7/16"	0.109375"	+/-0.011"	15/32"	59/64"	€65.48	RFQ
A	447008	7/16"	0.109375"	+/-0.011"	15/32"	1 1/8"	€81.07	RFQ
A	447012	9/16"	0.140625"	+/-0.011"	19/32"	1"	-	RFQ

TE-CO -

Flat Washers

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Size	Thickness	Price (ex. VAT)
A	42674	#8	3/16"	7/16"	-	5/64	€0.18
B	42660	#10	13/64"	1/2"	-	3/32"	€0.25
C	42670	1.125"	1.150"	2.25"	1 1/8"	7/32"	€19.69
D	42667	3/4"	25/32"	1.625"	3/4"	5/32	€1.24
E	426631	3/8"	13/32"	7/8"	3/8"	1/8"	€16.18
F	42666	5/8"	21/32"	1.375"	5/8"	1/8"	€15.85

ARMOR COAT -

Flat Washers

Style	Model	Fits Bolt Sizes	Inside Dia.	Item	Outside Dia.	Size	Thickness	Type	Price (ex. VAT)
A	UST236043	1/2"	17/32"	SAE Washer	1 1/16"	1/2"	7/64"	SAE	€5.16
B	UST237823	1/2"	9/16"	USS Washer	1.375"	1/2"	1/8"	USS	€10.26
C	UST237819	1/4"	5/16"	USS Washer	3/4"	1/4"	5/64"	USS	€12.49
D	UST236039	1/4"	9/32"	SAE Washer	5/8"	1/4"	5/64"	SAE	€8.83
E	UST237825	3/4"	13/16"	USS Washer	2"	3/4"	5/32"	USS	€19.92
F	UST236045	3/4"	13/16"	SAE Washer	1 15/32"	3/4"	9/64"	SAE	€6.44
G	UST237821	3/8"	7/16"	USS Washer	1"	3/8"	3/32"	USS	€8.35
H	UST236041	3/8"	13/32"	SAE Washer	13/16"	3/8"	3/32"	SAE	€6.26
I	UST237824	5/8"	21/32"	USS Washer	1.75"	5/8"	5/32"	USS	€16.79
J	UST236044	5/8"	11/16"	SAE Washer	1 5/16"	5/8"	1/8"	SAE	€8.12
K	UST236040	5/16"	11/32"	SAE Washer	11/16"	5/16"	3/32"	SAE	€4.28
L	UST237820	5/16"	3/8"	USS Washer	7/8"	5/16"	3/32"	USS	€6.72
M	UST237822	7/16"	1/2"	USS Washer	1.25"	7/16"	3/32"	USS	€7.08
N	UST236042	7/16"	15/32"	SAE Washer	59/64"	7/16"	3/32"	SAE	€3.97

EARNEST -

Flat Washers

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Package Weight	Size	Price (ex. VAT)
A	510120G	1"	1-1/16"	2"	2	1"	€21.37
B	510124G	1.25"	1.375"	2.5"	2.92	1 1/4 Lbs.	€35.23
B	510122G	1.125"	1.187"	2.25"	2.43	1 1/8"	€16.91
B	510128G	1.375"	1.437"	2.75"	1.53	1 3/8"	€11.79

FOREVERBOLT -

Fender Washers

Style	Model	Fits Bolt Sizes	Grade	Inside Dia.	Package Weight	Rockwell Hardness	Thickness	Thickness Tolerance	Price (ex. VAT)
A	FB3FEWASH122P5	1/2"	316	17/32"	0.25	B80	0.062"	+/-0.010"	€18.70
B	FBFEWASHT122	1/2"	18-8	17/32"	0.1	B70	1/8"	+/-0.015"	€7.87
C	FBFEWASHT382	3/8"	18-8	13/32"	0.1	B70	1/8"	+/-0.015"	€6.28

FOREVERBOLT -

Washers

Style	Model	Fits Bolt Sizes	Grade	Inside Dia.	Item	Outside Dia.	Package Weight	Rockwell Hardness	System of Measurement	Price (ex. VAT)
A	FBFLWASH6LOD2P100	#6	18-8	5/32"	Flat Washer	3/8"	0.1	B70	Inch	€54.62
B	FBFLWMS81P100	#8	18-8	11/64"	Mil Spec Washer	19/64"	0.05	B70	Inch	€56.57
C	FBFLWASH8LOD2P50	#8	18-8	3/16"	Flat Washer	7/16"	0.07	B70	Inch	€28.99
D	FBFLWASH8LOD2P100	#8	18-8	3/16"	Flat Washer	7/16"	0.1	B70	Inch	€66.14
E	FB3FLWASH8LOD2P100	#8	316	3/16"	Flat Washer	7/16"	0.1	B80	Inch	€55.45
F	FBFLWMS82P100	#8	18-8	3/16"	Mil Spec Washer	3/8"	0.08	B70	Inch	€62.07
G	FBFLWASH10LOD2P100	#10	18-8	7/32"	Flat Washer	1/2"	0.15	B70	Inch	€61.49
H	FBFLWASH10SODP100	#10	18-8	13/64"	Flat Washer	7/16"	0.08	B70	Inch	€57.92
I	FBFLWASH10LOD2P50	#10	18-8	7/32"	Flat Washer	1/2"	0.09	B70	Inch	€37.85
J	FB3FLWASH10LOD2P100	#10	316	7/32"	Flat Washer	1/2"	0.12	B80	Inch	€59.91
K	FBFLWASHN12SODP100	#12	18-8	1/4"	Flat Washer	9/16"	0.22	B70	Inch	€55.83
L	FB3FLWASHN12SODP25	#12	316	1/4"	Flat Washer	9/16"	0.08	B70	Inch	€23.32
M	FB3FLWASH1LOD2P10	1"	316	1-1/16"	Flat Washer	2.5"	0.64	B80	Inch	€31.85
N	FBFLWASH1LOD2P10	1"	18-8	1-1/16"	Flat Washer	2.5"	1.6	B70	Inch	€53.77
O	FB3FLWASH12SOD2P5	1/2"	316	17/32"	Flat Washer	1 1/16"	0.08	B70	Inch	€11.39
P	FB3FLWASH12LOD2P50	1/2"	316	9/16"	Flat Washer	1.375"	1.65	B80	Inch	€99.91
Q	FBFEWASH12112P10	1/2"	18-8	17/32"	Fender Washer	1.5"	0.26	B70	Inch	€14.72
R	FB3FLWASH12SODS2P25	1/2"	316	17/32"	Flat Washer	1 1/16"	0.47	B80	Inch	€39.20
S	FBFLWASH12SODP25	1/2"	18-8	9/16"	Flat Washer	1.25"	0.39	B70	Inch	€27.74
T	FBFLWASH12SODP100	1/2"	18-8	9/16"	Flat Washer	1.25"	1.65	B70	Inch	€89.34
U	FBFEWASH122P10	1/2"	18-8	17/32"	Fender Washer	2"	0.51	B70	Inch	€21.07
V	FBFLWASH12SOD2P10	1/2"	18-8	17/32"	Flat Washer	1 1/16"	0.14	B70	Inch	€13.63
W	FBFLWMS12P5	1/2"	18-8	17/32"	Mil Spec Washer	1 1/16"	0.08	B70	Inch	€6.85
X	FB3FLWASH14SODP100	1/4"	316	9/32"	Flat Washer	5/8"	0.3	B80	Inch	€54.87
Y	FB3FLWASH14LOD2P25	1/4"	316	5/16"	Flat Washer	3/4"	0.15	B70	Inch	€21.65

FOREVERBOLT -

Flat Washers

Style	Model	Fits Bolt Sizes	Grade	Inside Dia.	Outside Dia.	Package Weight	System of Measurement	Thickness	Thickness Tolerance	Price (ex. VAT)
A	FBFEWASHT34158	3/4"	18-8	25/32"	1.625"	0.11	Inch	1/4"	+/-0.010"	€6.81
B	FBFLWASH34SOD2	3/4"	18-8	13/16"	1.5"	0.04	Inch	0.108 to 0.16"	0.108 to 0.160"	€4.24
C	FB3FLWASH34LOD2P10	3/4"	316	13/16"	2"	1.1	Inch	0.122 to 0.177"	0.122 to 0.177"	€48.88
D	FB3FLWASH34SOD2	3/4"	316	13/16"	1.5"	0.05	Inch	0.108 to 0.16"	0.108 to 0.160"	€6.81
E	FB3FLWASH38LOD2P10	3/8"	316	7/16"	1"	0.15	Inch	0.064 to 0.104"	0.064 to 0.104"	€13.79
F	FBFLWASH38LOD2P25	3/8"	18-8	7/16"	1"	0.31	Inch	0.064 to 0.104"	0.064 to 0.104"	€23.69
G	FB3FLWASH38LOD3P100	3/8"	316	7/16"	1"	1.3	Inch	0.064 to 0.104"	0.064 to 0.104"	€116.92
H	FBFEWASHT78134	7/8"	18-8	29/32"	1.75"	0.12	Inch	1/4"	+/-0.010"	€7.96
I	FBFLWASH78SOD3P25	7/8"	18-8	15/16"	2"	1.7	Inch	0.11"	+/-0.010"	€48.00
J	FB3MWASH6P100	M6	316	6.40mm	12 mm	0.25	Metric	1.6mm	+/-0.20mm	€48.06
K	FB3MWASH8P100	M8	316	8.40mm	16 mm	0.47	Metric	1.6mm	+/-0.20mm	€60.06
L	FB3MWASH12P25	M12	316	13.00mm	24mm	0.35	Metric	2.5mm	+/-0.20mm	€21.16

MICRO PLASTICS -

Flat Washers

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Price (ex. VAT)
A	16FW002032	#2	0.094"	0.25"	0.031"	€3.63
B	17W01825	#2	0.094"	0.188"	0.02"	€3.81
C	16FW002062	#2	0.090"	0.25"	0.062"	€2.23
D	17W02190	#3	0.104"	0.22"	0.031"	€2.50
E	17W01906	#4	0.112"	0.206"	0.053"	€4.67
F	16FW004032	#4	0.120"	0.22"	0.031"	€3.14
G	17W02813	#4	0.120"	0.28"	0.031"	€3.96
H	16FW004062	#4	0.115"	0.25"	0.062"	€3.04
I	17W03904	#5	0.141"	0.406"	0.04"	€3.59
J	17W02851	#5	0.130"	0.285"	0.062"	€3.72
K	17W04400	#6	0.156"	0.438"	0.04"	€4.43
L	16FW006062	#6	0.140"	0.313"	0.062"	€3.57
M	17W03130	#6	0.162"	0.312"	0.062"	€4.09
N	16FW006032	#6	0.140"	0.312"	0.031"	€2.66
O	17W04081	#8	0.177"	0.408"	0.062"	€4.32
P	17W05008	#8	0.188"	0.5"	0.04"	€6.11
Q	16FW008062	#8	0.173"	0.375"	0.062"	€4.53
R	17W04373	#10	0.195"	0.437"	0.031"	€4.18
S	17W04601	#10	0.200"	0.45"	0.031"	€5.14
T	17W05623	#10	0.203"	0.562"	0.04"	€5.96
U	17W04502	#12	0.240"	0.465"	0.015"	€5.73
V	17W25001	1"	1.062"	2.5"	0.16"	€8.86
W	17W12504	1/2"	0.516"	1.25"	0.062"	€4.58
X	16FW500062	1/2"	0.505"	0.75"	0.062"	€6.72
Y	17W04720	1/4"	0.252"	0.472"	0.062"	€4.69

THOMAS & BETTS -

Reducer Washers

Style	Model	Price (ex. VAT)
A	B86NP	€0.43	RFQ
A	B71UF	€1.53	RFQ
A	RG9731	€8.62	RFQ
A	RG9711	€8.62	RFQ
A	RF10731U	€7.76	RFQ
A	RC363U	€2.16	RFQ
A	RB877U	€2.35	RFQ
A	RB873U	€1.90	RFQ
A	RB873NP	€1.00	RFQ
A	RG9711UF	€11.94	RFQ
A	BC72NP	€1.10	RFQ
A	C72M	€1.06	RFQ
A	RJ737NP	€16.31	RFQ
A	B87NPM	€0.69	RFQ
A	B75TB	€1.04	RFQ
A	RZ83NP	€2.96	RFQ
A	RB1333UNP	€1.67	RFQ
A	BC79NP	€1.12	RFQ
A	RG9751	€9.13	RFQ

GORLITZ -

Washers

Style	Model	Inside Dia.	Price (ex. VAT)
A	325	-	€10.10	RFQ
A	326	-	€12.43	RFQ
A	705	1"	€6.74	RFQ
A	1537	5/8"	€1.60	RFQ

COOPER B-LINE -

Flat Washers

Style	Model	Item
A	5/8 FW YZN BOXED	Flat Washer	RFQ
B	3/8FWZN	Flat Washer	RFQ
A	5/16 FW NYL BOXED	Flat Washer	RFQ
C	BFVFW3/8	Flat Washer	RFQ
C	BFVFW1/2	Flat Washer	RFQ
B	1/4FWZN	Flat Washer	RFQ
A	1/4 FW YZN BOXED	Flat Washer	RFQ
A	1/4 FW NYL BOXED	Flat Washer	RFQ
B	1/2FWZN	Flat Washer	RFQ
A	5/16 FW SB BOXED	Flat Washer	RFQ
A	1/2 FW YZN BOXED	Flat Washer	RFQ
A	3/8 FW YZN BOXED	Flat Washer	RFQ
A	3/8 FW SB BOXED	Flat Washer	RFQ
A	3/8 FW NYL BOXED	Flat Washer	RFQ
C	BFVFW5/8	Flat Washer	RFQ
C	BFVFW3/4	Flat Washer	RFQ
C	BFVFW1	Flat Washer	RFQ
B	5/8FWZN	Flat Washer	RFQ
A	5/16 FW YZN BOXED	Flat Washer	RFQ
B	WSHR,FLT 3/8 SS4	Washer	RFQ
B	WSHR,FLT 1/2 SS6	Washer	RFQ
B	WSHR,FLT 3/8 SS6 48/BAG	Washer	RFQ
B	WSHR,FLT 1/2 SS4	Washer	RFQ
B	WSHR,FLT 1/4 SS4	Washer	RFQ
B	WSHR,FLT 1/4 SS6	Washer	RFQ

COOPER B-LINE -

Fender Washers

Style	Model
A	WSHR,FENDER 3/8X1 1/2 SS6	RFQ
A	WSHR,FENDER 3/8X1 1/4 SS4	RFQ
A	WSHR,FENDER 3/8X1 1/4 SS6	RFQ
A	WSHR,FENDER 1/4X1 1/4 SS6	RFQ

COOPER B-LINE -

B3248 Steel Washer Plates

Style	Model
A	B3248-3/4 ZN	RFQ
A	B3248-3/8 ZN	RFQ
A	B3248-5/8 ZN	RFQ
A	B3248-7/8 PLN	RFQ
A	B3248-1/2 PLN	RFQ
A	B3248-1 ZN	RFQ
A	B3248-3/4 PLN	RFQ
A	B3248-7/8 ZN	RFQ
A	B3248-1/2 ZN	RFQ
A	B3248-1 PLN	RFQ
A	B3248-3/8 PLN	RFQ
A	B3248-5/8 PLN	RFQ

THOMAS & BETTS -

Compression And Flat Washers

Style	Model	Price (ex. VAT)
A	401	€22.36	RFQ
A	402	€32.99	RFQ
A	408	€198.10	RFQ
A	409	€264.42	RFQ

CS JOHNSON -

Flat Washer, 1/4 Inch Size, Stainless Steel, 10Pk

Model	Item	Price (ex. VAT)
60-601-SO	AG3NEW	€0.63

APPROVED VENDOR -

Flat Washer Stainless Steel Fits 1-1/8, 5PK

Model	Item	Price (ex. VAT)
U55205.112.0001	AB8ETQ	€10.34

APPROVED VENDOR -

Flat Washer Stainless Steel Fits 1-1/4, 5PK

Model	Item	Price (ex. VAT)
U55205.125.0001	AB8ETR	€10.12

APPROVED VENDOR -

Flat Washer Standard Stainless Steel 1 Inch, 5PK

Model	Item	Price (ex. VAT)
U55410.100.0002	AB7EHB	€11.97

WOODHEAD -

Flat Washer, M6 Size, Brass

Model	Item	Price (ex. VAT)
1301840027	CH2WYL	-	RFQ

1...456 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.

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Washers

Flat Washers

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B3248 Steel Washer Plates

Compression And Flat Washers

Flat Washer, 1/4 Inch Size, Stainless Steel, 10Pk

Flat Washer Stainless Steel Fits 1-1/8, 5PK

Flat Washer Stainless Steel Fits 1-1/4, 5PK

Flat Washer Standard Stainless Steel 1 Inch, 5PK

Flat Washer, M6 Size, Brass

Flat Washers

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Flat Washers

Flat Washer, 1/4 Inch Size, Stainless Steel, 10Pk

Flat Washer Stainless Steel Fits 1-1/8, 5PK

Flat Washer Stainless Steel Fits 1-1/4, 5PK

Flat Washer Standard Stainless Steel 1 Inch, 5PK

Flat Washer, M6 Size, Brass

Flat Washers

Frequently Asked Questions

What is the difference between flat washers and lock washers?

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