Washers - F844 (USS Flat Washer) & F436 Chart
USS FLATWASHERS USS washers are general purpose for both construction and manufacturing with an increased outer diameter in order to protect the component. They also have a larger ID and OD then SAE washers. They are for use with A307 and F1554 fasteners and wherever else they may be specified. Order Here.
F436 WASHERS F436 washers for use with A325 and A490 Structural Bolts. They are typically used with any bolts other than low carbon steel. Available in both Plain and Hot Dipped Galvanized Finish. They are through hardened or carburized in order to add strength however they are smaller than the standard F844 flat washers. Order Here.
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USS Flatwashers |
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Nominal Washer Size |
Series |
Inside Diameter |
Outside Diameter |
Thickness |
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|
Basic |
Tolerance |
Basic |
Tolerance |
Basic |
Maximum |
Minimum |
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|
Fraction |
Decimal |
Plus |
Minus |
Plus |
Minus |
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1/4 |
0.250 |
W |
0.312 |
0.015 |
0.005 |
0.734 |
0.015 |
0.007 |
0.065 |
0.080 |
0.051 |
|
3/8 |
0.375 |
W |
0.438 |
0.015 |
0.005 |
1.000 |
0.030 |
0.007 |
0.083 |
0.104 |
0.64 |
|
½ |
0.500 |
W |
0.562 |
0.015 |
0.005 |
1.375 |
0.030 |
0.007 |
0.109 |
0.132 |
0.086 |
|
5/8 |
0.625 |
W |
0.688 |
0.030 |
0.007 |
1.750 |
0.030 |
0.007 |
0.134 |
0.160 |
0.108 |
|
3/4 |
0.750 |
W |
0.812 |
0.030 |
0.007 |
2.000 |
0.030 |
0.007 |
0.148 |
0.177 |
0.122 |
|
7/8 |
0.875 |
W |
0.938 |
0.030 |
0.007 |
2.250 |
0.030 |
0.007 |
0.165 |
0.192 |
0.136 |
|
1 |
1.000 |
W |
1.062 |
0.030 |
0.007 |
2.500 |
0.030 |
0.007 |
0.165 |
0.192 |
0.136 |
|
1-1/8 |
1.125 |
W |
1.250 |
0.030 |
0.007 |
2.750 |
0.030 |
0.007 |
0.165 |
0.192 |
0.136 |
|
1-1/4 |
1.250 |
W |
1.375 |
0.030 |
0.007 |
3.000 |
0.030 |
0.007 |
0.165 |
0.192 |
0.136 |
|
1-3/8 |
1.375 |
W |
1.500 |
0.045 |
0.010 |
3.250 |
0.045 |
0.010 |
0.180 |
0.213 |
0.153 |
|
1-1/2 |
1.500 |
W |
1.625 |
0.045 |
0.010 |
3.500 |
0.045 |
0.010 |
0.180 |
0.213 |
0.153 |
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F436 Washers |
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Nominal Washer Size |
Weight per 100 Pieces |
Inside Diameter A |
OutsideDiameter B |
Thickness C |
Minimum Edge Distance E |
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|
Basic Washer |
Tolerance |
Basic |
Tolerance |
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|
Plus |
Minus |
Plus |
Minus |
Minimum |
Maximum |
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|
1/2 |
1.8 |
0.532 |
0.0313 |
0 |
1.063 |
0.0313 |
0.0313 |
0.097 |
0.177 |
0.438 |
|
5/8 |
3.3 |
0.688 |
0.0313 |
0 |
1.313 |
0.0313 |
0.0313 |
0.122 |
0.177 |
0.547 |
|
3/4 |
4.1 |
0.813 |
0.0313 |
0 |
1.469 |
0.0313 |
0.0313 |
0.122 |
0.177 |
0.656 |
|
7/8 |
6.4 |
0.938 |
0.0313 |
0 |
1.750 |
0.0313 |
0.0313 |
0.136 |
0.177 |
0.766 |
|
1 |
8.2 |
1.125 |
0.0313 |
0 |
2.000 |
0.0313 |
0.0313 |
0.136 |
0.177 |
0.875 |
|
1-1/8 |
10.5 |
1.250 |
0.0313 |
0 |
2.250 |
0.0313 |
0.0313 |
0.236 |
0.177 |
0.984 |
|
1-1/4 |
13.3 |
1.375 |
0.0313 |
0 |
2.500 |
0.0313 |
0.0313 |
0.136 |
0.177 |
1.094 |
|
1-3/8 |
16.3 |
1.500 |
0.0313 |
0 |
2.750 |
0.0313 |
0.0313 |
0.136 |
0.177 |
1.203 |
|
1-1/2 |
20 |
1.625 |
0.0313 |
0 |
3.000 |
0.0313 |
0.0313 |
0.136 |
0.177 |
1.313 |