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Washers
USS Flat Washers


USS Flat Washers

Brass Washers

Specifications – Dimensions & Approximate Weights based on mean dimensions in mfg.

United States Standard (USS) Flat Washers are used in most industrial applications. They are also designated as Type A Plain Washers, wide series. They were developed for use with coarse thread nuts and bolts.

    USS Flat Washers    
    Dimensions   Weights & Counts  
Bolt       Wt. Per No./Pcs. 1/4 Keg
Size I.D. O.D. Thick M Pcs. Per Lb. Quantity
3/16" 1/4" 9/16" 3/64" 2.8# 361 18,050
1/4" 5/16" 3/4" 1/16" 6.7# 149 7,450
5/16" 3/8" 7/8" 5/64" 11.5# 87 4,350
3/8" 7/16" 1" 5/64" 14.9# 67 3,350
7/16" 1/2" 1-1/4" 5/64" 24.4# 41 2,050
1/2" 9/16" 1-3/8" 7/64" 38.5# 26 1,300
9/16" 5/8" 1-1/2" 7/64" 45.5# 22 1,100
5/8" 11/16" 1-3/4" 9/64" 77.0# 13 650
3/4" 13/16" 2" 5/32" 110.0# 9.1 455
7/8" 15/16" 2-1/4" 11/64" 153.0# 6.5 325
1" 1-1/16" 2-1/2" 11/64" 188.0# 5.3 265
1-1/8" 1-1/4" 2-3/4" 11/64" 220.0# 4.5 225
1-1/4" 1-3/8" 3" 11/64" 260.0# 3.8 190
1-3/8" 1-1/2" 3-1/4" 3/16" 333.0# 3 150
1-1/2" 1-5/8" 3-1/2" 3/16" 385.0# 2.6 130
1-5/8" 1-3/4" 3-3/4" 3/16" 448.0# 2.3 115
1-3/4" 1-7/8" 4" 3/16" 500.0# 2 100
1-7/8" 2" 4-1/4" 3/16" 569.0# 1.8 88
2" 2-1/8" 4-1/2" 3/16" 630.0# 1.6 79
2-1/4" 2-3/8" 4-3/4" 7/32" 826.0# 1.2 60
2-1/2" 2-5/8" 5" 15/64" 961.0# 1 52
2-3/4" 2-7/8" 5-1/4" 1/4" 1100.0# 0.9 45
3" 3-1/8" 5-1/2" 9/32" 1300.0# 0.8 39

* 316” size is also #10 size.
Bolt Plain Finish   Zinc Plated   Bolt
Size 1# Box 5# Box Bulk 50# 1# Box 5# Box Bulk 50# Size
3/16"             3/16"
1/4"             1/4"
5/16"             5/16"
3/8"             3/8"
7/16"             7/16"
1/2"             1/2"
9/16"             9/16"
5/8"             5/8"
3/4"             3/4"
7/8"             7/8"
1"             1"
1-1/8"             1-1/8"
1-1/4"             1-1/4"
1-3/8"             1-3/8"
1-1/2"             1-1/2"
1-5/8" - -   - -   1-5/8"
1-3/4" - -   - -   1-3/4"
1-7/8" - -   - -   1-7/8"
2" - -   - -   2"
2-1/4" - -   - -   2-1/4"
2-1/2" - -   - -   2-1/2"
2-3/4" - -   - -   2-3/4"
3" - -   - -   3"

U.S. Standard Low Carbon Steel Galvanized Flat Washers

 
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