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SS External Tooth Lock Washer

Stainless Steel external tooth lock washers are used under bolt heads or nuts to increase the hold of the fastener. They can be manufactured of 18-8 or 400 series stainless steel. External tooth lock washers have teeth on the outer dimension of the washer creating a ratchet action by biting into the nut or screw head and the surface it contacts. Dimensional specifications are governed by ASME B18.21.1. Stainless steel fasteners are commonly used in applications that require general atmospheric corrosion resistance, such as chemical and food processing equipment.

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Governing Standards
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsExternal Tooth Lock Washer

Per ASME B18.21.1-2009
Size	Nominal	A		B		C
		Inside Diameter		Outside Diameter		Mean Section Thickness
		Max	Min	Max	Min	Max	Min
#3	0.0990	0.1090	0.1020	0.2350	0.2200	0.0160	0.0100
#4	0.1120	0.1230	0.1150	0.2600	0.2450	0.0180	0.0120
#5	0.1250	0.1360	0.1290	0.2850	0.2700	0.0200	0.0140
#6	0.1380	0.1500	0.1410	0.3200	0.3050	0.0220	0.0160
#8	0.1640	0.1760	0.1680	0.3810	0.3650	0.0230	0.0180
#10	0.1900	0.2040	0.1950	0.4100	0.3950	0.0240	0.0180
#12	0.2160	0.2310	0.2210	0.4750	0.4600	0.0270	0.0200
1/4	0.2500	0.2670	0.2560	0.5100	0.4940	0.0280	0.0230
5/16	0.3125	0.3320	0.3200	0.6100	0.5880	0.0340	0.0280
3/8	0.3750	0.3980	0.3840	0.6940	0.6700	0.0400	0.0320
7/16	0.4375	0.4640	0.4480	0.7600	0.7400	0.0400	0.0320
1/2	0.5000	0.5300	0.5130	0.9000	0.8800	0.0450	0.0370
9/16	0.5625	0.5960	0.5760	0.9850	0.9600	0.0450	0.0370
5/8	0.6250	0.6630	0.6410	1.0700	1.0450	0.0500	0.0420
3/4	0.7500	0.7950	0.7680	1.2600	1.2200	0.0550	0.0470
7/8	0.8750	0.9270	0.8970	1.4100	1.3800	0.0600	0.0520
1	1.0000	1.0600	1.0250	1.6200	1.5900	0.0670	0.0590

All dimensions are in inches.

SS External Tooth Lock Washer

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Diameter Inside Diameter Outside Diameter Thickness Item # Availability Price Quantity UOM

0.1410

0.3125

0.0160

WLES 4

184 In Stock

$0.01103/EA

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#4 Stainless Steel External Tooth Lock Washer

$0.01103/EA

Qty

184 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.01103/EA
29100	$0.01034/EA
116370	$0.00921/EA
465470	$0.0061/EA

0.1680

0.3750

0.0180

WLES 6

250 In Stock

$0.01226/EA

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#8 Stainless Steel External Tooth Lock Washer

$0.01226/EA

Qty

250 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.01226/EA
17060	$0.01149/EA
68220	$0.01023/EA
272870	$0.00678/EA

#10

0.1950

0.4062

0.0180

WLES 8

242 In Stock

$0.08324/EA

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#10 Stainless Steel External Tooth Lock Washer

$0.08324/EA

Qty

242 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.08324/EA
14140	$0.07799/EA
56530	$0.06945/EA
226090	$0.04602/EA

#12

0.2210

0.4688

0.0200

WLES 10

400 In Stock

$0.08329/EA

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#12 Stainless Steel External Tooth Lock Washer

$0.08329/EA

Qty

400 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.08329/EA
7860	$0.07802/EA
31410	$0.06949/EA
125610	$0.04605/EA

1/4

0.2560

0.5000

0.0230

WLES025

3755 In Stock

$0.051/EA

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1/4 Stainless Steel External Tooth Lock Washer

$0.051/EA

Qty

3755 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.051/EA
7280	$0.04778/EA
29100	$0.04255/EA
116370	$0.0282/EA

5/16

0.3200

0.5938

0.0280

WLES031

3547 In Stock

$0.0815/EA

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5/16 Stainless Steel External Tooth Lock Washer

$0.0815/EA

Qty

3547 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.0815/EA
5100	$0.07639/EA
20400	$0.06792/EA
81580	$0.04526/EA

3/8

0.3840

0.6875

0.0320

WLES037

147 In Stock

$0.12435/EA

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3/8 Stainless Steel External Tooth Lock Washer

$0.12435/EA

Qty

147 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.12435/EA
3260	$0.11668/EA
13020	$0.10353/EA
52060	$0.06952/EA

1/2

0.5130

0.9600

0.0320

WLES050

4 In Stock

$0.23801/EA

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1/2 Stainless Steel External Tooth Lock Washer

$0.23801/EA

Qty

4 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.23801/EA
1190	$0.22395/EA
4730	$0.19789/EA
18890	$0.13634/EA

5/8

0.6410

1.0450

0.0420

WLES062

345 In Stock

$0.45452/EA

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5/8 Stainless Steel External Tooth Lock Washer

$0.45452/EA

Qty

345 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.45452/EA
1500	$0.42811/EA
5990	$0.37776/EA
26940	$0.26227/EA

SS External Tooth Lock Washer

Technical Data

Governing Standards

Governing StandardsExternal Tooth Lock Washer

Dimensional Specifications

Dimensional SpecificationsExternal Tooth Lock Washer

Grade

Diameter

Thickness

Outside Diameter

Inside Diameter

#4 Stainless Steel External Tooth Lock Washer

#8 Stainless Steel External Tooth Lock Washer

#10 Stainless Steel External Tooth Lock Washer

#12 Stainless Steel External Tooth Lock Washer

1/4 Stainless Steel External Tooth Lock Washer

5/16 Stainless Steel External Tooth Lock Washer

3/8 Stainless Steel External Tooth Lock Washer

1/2 Stainless Steel External Tooth Lock Washer

5/8 Stainless Steel External Tooth Lock Washer