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B.M.P. is currently ISO 9001:2015 registered.

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ISO 9001:2015
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B.M.P. Workmanship
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USS Hardened Pattern
USS Through Hardened Flat Washers
For use with ASTM A325/A490 & Grades 5,8,9 Bolts.
Bolt Size Outside Diameter Inside Diameter Thickness Pieces Per
Box
Weight Per
Box
- - - Min Max - -
1/4 3/4 5/16 0.051 0.080 7,500 46
5/16 7/8 3/8 0.064 0.104 4,500 39
3/8 1" 7/16 0.064 0.104 3,300 40
7/16 1-1/4 1/2 0.064 0.104 2,000 44
1/2 1-3/8 9/16 0.086 0.132 1,300 37
9/16 1-1/2 5/8 0.086 0.132 1,100 44
5/8 1-3/4 11/16 0.108 0.160 650 43
3/4 2" 13/16 0.122 0.177 450 39
7/8 2-1/4 15/16 0.136 0.192 325 44
1" 2-1/2 1-1/16 0.136 0.192 250 38
1-1/8 2-3/4 1-1/4 0.136 0.192 225 40
1-1/4 3" 1-3/8 0.136 0.192 190 43
1-3/8 3-1/4 1-1/2 0.153 0.213 150 49
1-1/2 3-1/2 1-5/8 0.153 0.213 130 49
Uss Hardened Washers are stocked in Plain and Zinc & Yellow Finish
Please Call For Availability!