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Thru Hardened Uss Flat Washer, Plated

Thru-hardened USS flat washers are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. Flat washers are also used to give tightness to a joint, to prevent leakage, and especially to distribute pressure under the head of a bolt or nut. Dimensional specifications are governed by ASME B18.21.1. USS (United States Standard) flat washers have a larger outer diameter than SAE (Society of Automotive Engineers) flat washers, and can be utilized in nearly any application. Available in zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.

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Governing Standards
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsThru Hardened USS Flat Washer

Per ASME B18.21.1-2009
Size	Nominal	A			B			C
		Inside Diameter			Outside Diameter			Mean Section Thickness
		Basic	Tolerance Plus	Tolerance Minus	Basic	Tolerance Plus	Tolerance Minus	Basic	Max	Min
		Basic	Tolerance Plus	Tolerance Minus	Basic	Tolerance Plus	Tolerance Minus	Basic	Max	Min
#6	0.1380	0.1560	0.0080	0.0050	0.3750	0.0150	0.0050	0.0490	0.0650	0.0360
#8	0.1640	0.1880	0.0080	0.0050	0.4380	0.0150	0.0050	0.0490	0.0650	0.0360
#10	0.1900	0.2190	0.0080	0.0050	0.5000	0.0150	0.0050	0.0490	0.0650	0.0360
#12	0.2160	0.2500	0.0150	0.0050	0.5620	0.0150	0.0050	0.0650	0.0800	0.0510
1/4	0.2500	0.3120	0.0150	0.0050	0.7340	0.0150	0.0070	0.0650	0.0800	0.0510
5/16	0.3125	0.3750	0.0150	0.0050	0.8750	0.0300	0.0070	0.0830	0.1040	0.0640
3/8	0.3750	0.4380	0.0150	0.0050	1.0000	0.0300	0.0070	0.0830	0.1040	0.0640
7/16	0.4375	0.5000	0.0150	0.0050	1.2500	0.0300	0.0070	0.0830	0.1040	0.0640
1/2	0.5000	0.5620	0.0150	0.0050	1.3750	0.0300	0.0070	0.1090	0.1320	0.0860
9/16	0.5625	0.6250	0.0150	0.0050	1.4690	0.0300	0.0070	0.1090	0.1320	0.0860
5/8	0.6250	0.6880	0.0300	0.0070	1.7500	0.0300	0.0070	0.1340	0.1600	0.1080
3/4	0.7500	0.8120	0.0300	0.0070	2.0000	0.0300	0.0070	0.1480	0.1770	0.1220
7/8	0.8750	0.9380	0.0300	0.0070	2.2500	0.0300	0.0070	0.1650	0.1920	0.1360
1	1.0000	1.0625	0.0300	0.0070	2.5000	0.0300	0.0070	0.1650	0.1920	0.1360
1 1/8	1.1250	1.250	0.0300	0.0070	2.7500	0.0300	0.0070	0.1650	0.1920	0.1360
1 1/4	1.2500	1.3750	0.0300	0.0070	3.0000	0.0300	0.0070	0.1650	0.1920	0.1360
1 3/8	1.3750	1.5000	0.0450	0.0100	3.2500	0.0450	0.1000	0.1800	0.2130	0.1530
1 1/2	1.5000	1.6250	0.0450	0.0100	3.5000	0.0450	0.0100	0.1800	0.2130	0.1530
1 5/8	1.6250	1.7500	0.0450	0.0100	3.7500	0.0450	0.0100	0.1800	0.2130	0.1530
1 3/4	1.7500	1.8750	0.0450	0.0100	4.0000	0.0450	0.0100	0.1800	0.2130	0.1530
1 7/8	1.8750	2.0000	0.0450	0.0100	4.2500	0.0450	0.0100	0.1800	0.2130	0.1530
2	2.0000	2.1250	0.0450	0.0100	4.5000	0.0450	0.0100	0.1800	0.2130	0.1530
2 1/4	2.2500	2.3750	0.0450	0.0100	4.7500	0.0450	0.0100	0.2200	0.2480	0.1930
2 1/2	2.5000	2.6250	0.0450	0.0100	5.0000	0.0450	0.0100	0.2380	0.2800	0.2100
2 3/4	2.7500	2.8750	0.0650	0.0100	5.2500	0.0650	0.0100	0.2590	0.3100	0.2280
3	3.0000	3.1250	0.0650	0.0100	5.5000	0.0650	0.0100	0.2840	0.3270	0.2490

All dimensions are in inches.

Thru Hardened Uss Flat Washer, Plated

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

1/4

0.3120

0.7340

0.0650

WF8P025

3129 In Stock

$0.06827/EA

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1/4 Thru Hardened Steel Uss Flat Washer, Plated

$0.06827/EA

Qty

3129 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.06827/EA
1560	$0.06394/EA
6240	$0.05701/EA
28040	$0.03755/EA

5/16

0.3750

0.8750

0.0830

WF8P031

6475 In Stock

$0.07716/EA

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5/16 Thru Hardened Steel Uss Flat Washer, Plated

$0.07716/EA

Qty

6475 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.07716/EA
1000	$0.07228/EA
4000	$0.06437/EA
17970	$0.04266/EA

3/8

0.4380

1.0000

0.0830

WF8P037

3026 In Stock

$0.06099/EA

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3/8 Thru Hardened Steel Uss Flat Washer, Plated

$0.06099/EA

Qty

3026 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.06099/EA
770	$0.05727/EA
3080	$0.05121/EA
13830	$0.0339/EA

7/16

0.5000

1.2500

0.0830

WF8P043

1126 In Stock

$0.19332/EA

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7/16 Thru Hardened Steel Uss Flat Washer, Plated

$0.19332/EA

Qty

1126 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.19332/EA
480	$0.18135/EA
1910	$0.16094/EA
8570	$0.10799/EA

1/2

0.5620

1.3750

0.1090

WF8P050

2003 In Stock

$0.15061/EA

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1/2 Thru Hardened Steel Uss Flat Washer, Plated

$0.15061/EA

Qty

2003 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.15061/EA
260	$0.14138/EA
1040	$0.12534/EA
4650	$0.08445/EA

9/16

0.6250

1.4690

0.1090

WF8P056

206 In Stock

$0.43921/EA

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9/16 Thru Hardened Steel Uss Flat Washer, Plated

$0.43921/EA

Qty

206 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.43921/EA
230	$0.41229/EA
890	$0.36552/EA
4000	$0.24627/EA

5/8

0.6880

1.7500

0.1340

WF8P062

1136 In Stock

$0.28194/EA

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5/8 Thru Hardened Steel Uss Flat Washer, Plated

$0.28194/EA

Qty

1136 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.28194/EA
130	$0.26487/EA
520	$0.23444/EA
2310	$0.15927/EA

3/4

0.8120

2.0000

0.1480

WF8P075

694 In Stock

$0.44399/EA

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3/4 Thru Hardened Steel Uss Flat Washer, Plated

$0.44399/EA

Qty

694 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.44399/EA
100	$0.41739/EA
400	$0.36912/EA
1800	$0.25221/EA

7/8

0.9380

2.2500

0.1650

WF8P087

229 In Stock

$0.94524/EA

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7/8 Thru Hardened Steel Uss Flat Washer, Plated

$0.94524/EA

Qty

229 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.94524/EA
80	$0.88917/EA
290	$0.78552/EA
1310	$0.54071/EA

1.0625

2.5000

0.1650

WF8P100

1214 In Stock

$1.26033/EA

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1 Thru Hardened Steel Uss Flat Washer, Plated

$1.26033/EA

Qty

1214 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.26033/EA
60	$1.18648/EA
240	$1.0473/EA
1070	$0.72451/EA

1 1/8

1.2500

2.7500

0.1650

WF8P112

190 In Stock

$1.17413/EA

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1 1/8 Thru Hardened Steel Uss Flat Washer, Plated

$1.17413/EA

Qty

190 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.17413/EA
60	$1.10646/EA
210	$0.97631/EA
910	$0.6814/EA

1 1/4

1.3750

3.0000

0.1650

WF8P125

243 In Stock

$1.43606/EA

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1 1/4 Thru Hardened Steel Uss Flat Washer, Plated

$1.43606/EA

Qty

243 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.43606/EA
50	$1.35329/EA
180	$1.1941/EA
770	$0.8334/EA

1 1/2

1.6250

3.5000

0.1800

WF8P150

125 In Stock

$2.15708/EA

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1 1/2 Thru Hardened Steel Uss Flat Washer, Plated

$2.15708/EA

Qty

125 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.15708/EA
40	$2.03495/EA
130	$1.79425/EA
570	$1.26238/EA

Thru Hardened Uss Flat Washer, Plated

Technical Data

Governing Standards

Governing StandardsThru Hardened USS Flat Washer

Dimensional Specifications

Dimensional SpecificationsThru Hardened USS Flat Washer

Grade

Diameter

Thickness

Outside Diameter

Inside Diameter

1/4 Thru Hardened Steel Uss Flat Washer, Plated

5/16 Thru Hardened Steel Uss Flat Washer, Plated

3/8 Thru Hardened Steel Uss Flat Washer, Plated

7/16 Thru Hardened Steel Uss Flat Washer, Plated

1/2 Thru Hardened Steel Uss Flat Washer, Plated

9/16 Thru Hardened Steel Uss Flat Washer, Plated

5/8 Thru Hardened Steel Uss Flat Washer, Plated

3/4 Thru Hardened Steel Uss Flat Washer, Plated

7/8 Thru Hardened Steel Uss Flat Washer, Plated

1 Thru Hardened Steel Uss Flat Washer, Plated

1 1/8 Thru Hardened Steel Uss Flat Washer, Plated

1 1/4 Thru Hardened Steel Uss Flat Washer, Plated

1 1/2 Thru Hardened Steel Uss Flat Washer, Plated