Home > Fasteners > Washers > Flat Washers > USS Flat Washer, Plated

Enlarge

Uss Flat Washer, Plated

Low carbon USS flat washers, typically used with Grade 8 or hardened steel bolting, 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. ASTM F844 covers the standard specifications for unhardened steel flat washers for general use. Available in zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.

Products
Governing Standards
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsUSS 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	1.2500	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.

Uss Flat Washer, Plated

of 1

Sort By

Show

View

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

0.1560

0.3750

0.0490

WFPL 6

3976 In Stock

$0.01019/EA

See Quantity Discounts

#6 Low Carbon Steel Uss Flat Washer, Plated

$0.01019/EA

Qty

3976 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.01019/EA
3710	$0.00953/EA
14820	$0.00852/EA
59260	$0.00557/EA

0.1880

0.4380

0.0490

WFPL 8

5424 In Stock

$0.01636/EA

See Quantity Discounts

#8 Low Carbon Steel Uss Flat Washer, Plated

$0.01636/EA

Qty

5424 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.01636/EA
2770	$0.01531/EA
11050	$0.01368/EA
44200	$0.00894/EA

#10

0.2190

0.5000

0.0490

WFPL 10

3510 In Stock

$0.05695/EA

See Quantity Discounts

#10 Low Carbon Steel Uss Flat Washer, Plated

$0.05695/EA

Qty

3510 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.05695/EA
1340	$0.05327/EA
5330	$0.04762/EA
21290	$0.03112/EA

#12

0.2500

0.5620

0.0650

WFPL 12

4662 In Stock

$0.03515/EA

See Quantity Discounts

#12 Low Carbon Steel Uss Flat Washer, Plated

$0.03515/EA

Qty

4662 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.03515/EA
1340	$0.03288/EA
5340	$0.02939/EA
21330	$0.01921/EA

1/4

0.3120

0.7340

0.0650

WFPL025

14358 In Stock

$0.03411/EA

See Quantity Discounts

1/4 Low Carbon Steel Uss Flat Washer, Plated

$0.03411/EA

Qty

14358 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.03411/EA
1540	$0.03195/EA
6160	$0.02849/EA
27720	$0.01877/EA

5/16

0.3750

0.8750

0.0830

WFPL031

8128 In Stock

$0.17029/EA

See Quantity Discounts

5/16 Low Carbon Steel Uss Flat Washer, Plated

$0.17029/EA

Qty

8128 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.17029/EA
840	$0.15953/EA
3330	$0.14207/EA
14950	$0.09415/EA

3/8

0.4380

1.0000

0.0830

WFPL037

12139 In Stock

$0.05501/EA

See Quantity Discounts

3/8 Low Carbon Steel Uss Flat Washer, Plated

$0.05501/EA

Qty

12139 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.05501/EA
650	$0.05165/EA
2580	$0.04618/EA
11600	$0.03058/EA

7/16

0.5000

1.2500

0.0830

WFPL043

492 In Stock

$0.17918/EA

See Quantity Discounts

7/16 Low Carbon Steel Uss Flat Washer, Plated

$0.17918/EA

Qty

492 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.17918/EA
400	$0.16808/EA
1600	$0.14917/EA
7200	$0.10009/EA

1/2

0.5620

1.3750

0.1090

WFPL050

4914 In Stock

$0.1326/EA

See Quantity Discounts

1/2 Low Carbon Steel Uss Flat Washer, Plated

$0.1326/EA

Qty

4914 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.1326/EA
270	$0.12448/EA
1050	$0.11035/EA
4720	$0.07435/EA

9/16

0.6250

1.4690

0.1090

WFPL056

174 In Stock

$0.48158/EA

See Quantity Discounts

9/16 Low Carbon Steel Uss Flat Washer, Plated

$0.48158/EA

Qty

174 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.48158/EA
230	$0.45206/EA
920	$0.40077/EA
4110	$0.27003/EA

5/8

0.6880

1.7500

0.1340

WFPL062

1974 In Stock

$0.2597/EA

See Quantity Discounts

5/8 Low Carbon Steel Uss Flat Washer, Plated

$0.2597/EA

Qty

1974 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.2597/EA
130	$0.24398/EA
520	$0.21595/EA
2310	$0.14671/EA

3/4

0.8120

2.0000

0.1480

WFPL075

1756 In Stock

$0.33481/EA

See Quantity Discounts

3/4 Low Carbon Steel Uss Flat Washer, Plated

$0.33481/EA

Qty

1756 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.33481/EA
90	$0.31476/EA
360	$0.27835/EA
1610	$0.19019/EA

7/8

0.9380

2.2500

0.1650

WFPL087

303 In Stock

$0.47336/EA

See Quantity Discounts

7/8 Low Carbon Steel Uss Flat Washer, Plated

$0.47336/EA

Qty

303 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.47336/EA
70	$0.44528/EA
270	$0.39338/EA
1180	$0.27078/EA

1.0625

2.5000

0.1650

WFPL100

1021 In Stock

$0.69364/EA

See Quantity Discounts

1 Low Carbon Steel Uss Flat Washer, Plated

$0.69364/EA

Qty

1021 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.69364/EA
60	$0.653/EA
220	$0.57639/EA
960	$0.39874/EA

1 1/8

1.2500

2.7500

0.1650

WFPL112

34 In Stock

$0.6167/EA

See Quantity Discounts

1 1/8 Low Carbon Steel Uss Flat Washer, Plated

$0.6167/EA

Qty

34 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.6167/EA
50	$0.58116/EA
190	$0.5128/EA
820	$0.3579/EA

1 1/4

1.3750

3.0000

0.1650

WFPL125

471 In Stock

$1.35336/EA

See Quantity Discounts

1 1/4 Low Carbon Steel Uss Flat Washer, Plated

$1.35336/EA

Qty

471 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.35336/EA
40	$1.27536/EA
160	$1.12534/EA
690	$0.78541/EA

1 3/8

1.5000

3.2500

0.1800

WFPL137

58 In Stock

$2.60982/EA

See Quantity Discounts

1 3/8 Low Carbon Steel Uss Flat Washer, Plated

$2.60982/EA

Qty

58 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.60982/EA
30	$2.46206/EA
120	$2.17084/EA
530	$1.52733/EA

1 1/2

1.6250

3.5000

0.1800

WFPL150

119 In Stock

$1.34266/EA

See Quantity Discounts

1 1/2 Low Carbon Steel Uss Flat Washer, Plated

$1.34266/EA

Qty

119 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.34266/EA
30	$1.26665/EA
100	$1.11682/EA
500	$0.78576/EA

1 3/4

1.8750

4.0000

0.1800

WFPL175

120 In Stock

$1.69168/EA

See Quantity Discounts

1 3/4 Low Carbon Steel Uss Flat Washer, Plated

$1.69168/EA

Qty

120 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.69168/EA
25	$1.59591/EA
80	$1.40714/EA
500	$0.99002/EA

1 7/8

2.0000

4.2500

0.1800

WFPL187

2 In Stock

$1.6471/EA

See Quantity Discounts

1 7/8 Low Carbon Uss Flat Washer, Plated

$1.6471/EA

Qty

2 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.6471/EA
25	$1.55385/EA
70	$1.37005/EA
500	$0.96392/EA

2.1250

4.5000

0.1800

WFPL200

78 In Stock

$4.25385/EA

See Quantity Discounts

2 Low Carbon Steel Uss Flat Washer, Plated

$4.25385/EA

Qty

78 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.25385/EA
25	$4.01302/EA
70	$3.53833/EA
500	$2.48946/EA

2 1/4

2.3750

4.7500

0.2200

WFPL225

54 In Stock

$1.89172/EA

See Quantity Discounts

2 1/4 Low Carbon Uss Flat Washer, Plated

$1.89172/EA

Qty

54 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.89172/EA
25	$1.78462/EA
50	$1.57352/EA
500	$1.10708/EA

3.1250

5.5000

0.2840

WFPL300

13 In Stock

$3.07593/EA

See Quantity Discounts

3 Low Carbon Uss Flat Washer, Plated

$3.07593/EA

Qty

13 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.07593/EA
40	$2.90178/EA
70	$2.55855/EA
140	$1.80011/EA

Uss Flat Washer, Plated

Technical Data

Governing Standards

Governing StandardsUSS Flat Washer

Dimensional Specifications

Dimensional SpecificationsUSS Flat Washer

Grade

Diameter

Thickness

Outside Diameter

Inside Diameter

#6 Low Carbon Steel Uss Flat Washer, Plated

#8 Low Carbon Steel Uss Flat Washer, Plated

#10 Low Carbon Steel Uss Flat Washer, Plated

#12 Low Carbon Steel Uss Flat Washer, Plated

1/4 Low Carbon Steel Uss Flat Washer, Plated

5/16 Low Carbon Steel Uss Flat Washer, Plated

3/8 Low Carbon Steel Uss Flat Washer, Plated

7/16 Low Carbon Steel Uss Flat Washer, Plated

1/2 Low Carbon Steel Uss Flat Washer, Plated

9/16 Low Carbon Steel Uss Flat Washer, Plated

5/8 Low Carbon Steel Uss Flat Washer, Plated

3/4 Low Carbon Steel Uss Flat Washer, Plated

7/8 Low Carbon Steel Uss Flat Washer, Plated

1 Low Carbon Steel Uss Flat Washer, Plated

1 1/8 Low Carbon Steel Uss Flat Washer, Plated

1 1/4 Low Carbon Steel Uss Flat Washer, Plated

1 3/8 Low Carbon Steel Uss Flat Washer, Plated

1 1/2 Low Carbon Steel Uss Flat Washer, Plated

1 3/4 Low Carbon Steel Uss Flat Washer, Plated

1 7/8 Low Carbon Uss Flat Washer, Plated

2 Low Carbon Steel Uss Flat Washer, Plated

2 1/4 Low Carbon Uss Flat Washer, Plated

3 Low Carbon Uss Flat Washer, Plated

ASTM F844	Covers standard, unhardened steel washers for general use.
ASME B18.21.1	Covers the dimensional requirements, physical properties, and related test methods for helical spring-lock washers (#0 through 3 inches), tooth-lock washers (#2 through 1 ¼ inches), and plain washers (#0 through 3 inches).