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

Enlarge

USS Flat Washer, Galvanized

Low carbon 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 structural ASTM F436 flat washers, and can be utilized in nearly any application. ASTM F844 covers the standard specifications for unhardened steel flat washers for general use. Hot dip galvanizing provides a highly corrosion resistant finish, made of sacrificial zinc.

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, Galvanized

of 1

Sort By

Show

View

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

1/4

0.3120

0.7340

0.0650

WFGA025

624 In Stock

$0.03545/EA

See Quantity Discounts

1/4 Low Carbon Steel USS Flat Washer, Galvanized

$0.03545/EA

Qty

624 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.03545/EA
1540	$0.0332/EA
6160	$0.02961/EA
27720	$0.0195/EA

5/16

0.3750

0.8750

0.0830

WFGA031

3049 In Stock

$0.12477/EA

See Quantity Discounts

5/16 Low Carbon Steel USS Flat Washer, Galvanized

$0.12477/EA

Qty

3049 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.12477/EA
840	$0.11688/EA
3330	$0.10409/EA
14950	$0.06898/EA

3/8

0.4380

1.0000

0.0830

WFGA037

6081 In Stock

$0.0866/EA

See Quantity Discounts

3/8 Low Carbon Steel USS Flat Washer, Galvanized

$0.0866/EA

Qty

6081 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.0866/EA
650	$0.08131/EA
2580	$0.07271/EA
11600	$0.04814/EA

7/16

0.5000

1.2500

0.0830

WFGA043

1167 In Stock

$0.1909/EA

See Quantity Discounts

7/16 Low Carbon Steel USS Flat Washer, Galvanized

$0.1909/EA

Qty

1167 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.1909/EA
400	$0.17908/EA
1600	$0.15893/EA
7200	$0.10663/EA

1/2

0.5620

1.3750

0.1090

WFGA050

9569 In Stock

$0.25215/EA

See Quantity Discounts

1/2 Low Carbon Steel USS Flat Washer, Galvanized

$0.25215/EA

Qty

9569 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.25215/EA
260	$0.2367/EA
1030	$0.20984/EA
4610	$0.14139/EA

9/16

0.6250

1.4690

0.1090

WFGA056

825 In Stock

$0.35162/EA

See Quantity Discounts

9/16 Low Carbon Steel USS Flat Washer, Galvanized

$0.35162/EA

Qty

825 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.35162/EA
50	$0.33034/EA
180	$0.29238/EA
790	$0.19863/EA

5/8

0.6880

1.7500

0.1340

WFGA062

6151 In Stock

$0.3778/EA

See Quantity Discounts

5/8 Low Carbon Steel USS Flat Washer, Galvanized

$0.3778/EA

Qty

6151 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.3778/EA
130	$0.35493/EA
520	$0.31415/EA
2310	$0.21342/EA

3/4

0.8120

2.0000

0.1480

WFGA075

4206 In Stock

$0.54592/EA

See Quantity Discounts

3/4 Low Carbon Steel USS Flat Washer, Galvanized

$0.54592/EA

Qty

4206 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.54592/EA
90	$0.51321/EA
360	$0.45386/EA
1610	$0.31012/EA

7/8

0.9380

2.2500

0.1650

WFGA087

5666 In Stock

$0.63897/EA

See Quantity Discounts

7/8 Low Carbon Steel USS Flat Washer, Galvanized

$0.63897/EA

Qty

5666 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.63897/EA
230	$0.60107/EA
920	$0.531/EA
4110	$0.36551/EA

1.0625

2.5000

0.1650

WFGA100

365 In Stock

$0.99312/EA

See Quantity Discounts

1 Low Carbon Steel USS Flat Washer, Galvanized

$0.99312/EA

Qty

365 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.99312/EA
60	$0.93493/EA
220	$0.82525/EA
960	$0.5709/EA

1 1/8

1.2500

2.7500

0.1650

WFGA112

327 In Stock

$0.80675/EA

See Quantity Discounts

1 1/8 Low Carbon Steel USS Flat Washer, Galvanized

$0.80675/EA

Qty

327 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.80675/EA
50	$0.76026/EA
190	$0.67083/EA
820	$0.46819/EA

1 1/4

1.3750

3.0000

0.1650

WFGA125

368 In Stock

$1.71226/EA

See Quantity Discounts

1 1/4 Low Carbon Steel USS Flat Washer, Galvanized

$1.71226/EA

Qty

368 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.71226/EA
40	$1.61358/EA
160	$1.42378/EA
690	$0.9937/EA

1 3/8

1.5000

3.2500

0.1800

WFGA137

252 In Stock

$3.21122/EA

See Quantity Discounts

1 3/8 Low Carbon Steel USS Flat Washer, Galvanized

$3.21122/EA

Qty

252 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.21122/EA
30	$3.02942/EA
120	$2.67108/EA
530	$1.87929/EA

1 1/2

1.6250

3.5000

0.1800

WFGA150

184 In Stock

$2.29159/EA

See Quantity Discounts

1 1/2 Low Carbon Steel USS Flat Washer, Galvanized

$2.29159/EA

Qty

184 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.29159/EA
30	$2.16185/EA
100	$1.90613/EA
500	$1.3411/EA

1 5/8

1.7500

3.7500

0.1800

WFGA162

243 In Stock

$4.0152/EA

See Quantity Discounts

1 5/8 Low Carbon Steel USS Flat Washer, Galvanized

$4.0152/EA

Qty

243 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.0152/EA
25	$3.78788/EA
90	$3.33983/EA
500	$2.3498/EA

1 3/4

1.8750

4.0000

0.1800

WFGA175

2 In Stock

$5.83823/EA

See Quantity Discounts

1 3/4 Low Carbon Steel USS Flat Washer, Galvanized

$5.83823/EA

Qty

2 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$5.83823/EA
25	$5.50769/EA
80	$4.85621/EA
500	$3.41668/EA

1 7/8

2.0000

4.2500

0.1800

WFGA187

193 In Stock

$4.07443/EA

See Quantity Discounts

1 7/8 Low Carbon Steel USS Flat Washer, Galvanized

$4.07443/EA

Qty

193 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.07443/EA
25	$3.84375/EA
70	$3.38909/EA
500	$2.38446/EA

2.1250

4.5000

0.1800

WFGA200

40 In Stock

$3.51295/EA

See Quantity Discounts

2 Low Carbon Steel USS Flat Washer, Galvanized

$3.51295/EA

Qty

40 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.51295/EA
25	$3.31406/EA
70	$2.92206/EA
500	$2.05587/EA

USS Flat Washer, Galvanized

Technical Data

Governing Standards

Governing StandardsUSS Flat Washer

Dimensional Specifications

Dimensional SpecificationsUSS Flat Washer

Category

Outside Diameter

Diameter

Grade

Inside Diameter

Thickness

1/4 Low Carbon Steel USS Flat Washer, Galvanized

5/16 Low Carbon Steel USS Flat Washer, Galvanized

3/8 Low Carbon Steel USS Flat Washer, Galvanized

7/16 Low Carbon Steel USS Flat Washer, Galvanized

1/2 Low Carbon Steel USS Flat Washer, Galvanized

9/16 Low Carbon Steel USS Flat Washer, Galvanized

5/8 Low Carbon Steel USS Flat Washer, Galvanized

3/4 Low Carbon Steel USS Flat Washer, Galvanized

7/8 Low Carbon Steel USS Flat Washer, Galvanized

1 Low Carbon Steel USS Flat Washer, Galvanized

1 1/8 Low Carbon Steel USS Flat Washer, Galvanized

1 1/4 Low Carbon Steel USS Flat Washer, Galvanized

1 3/8 Low Carbon Steel USS Flat Washer, Galvanized

1 1/2 Low Carbon Steel USS Flat Washer, Galvanized

1 5/8 Low Carbon Steel USS Flat Washer, Galvanized

1 3/4 Low Carbon Steel USS Flat Washer, Galvanized

1 7/8 Low Carbon Steel USS Flat Washer, Galvanized

2 Low Carbon Steel USS Flat Washer, Galvanized

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).