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56WUSSH , USS Thru-Hardened Flat Washers

Manufactured to ASME B18.22.1 specification & a hardness of HRC 38-45
Hardness: Rockwell C38 - 45
Steel zinc yellow plated & baked after plating

Free manufacture's certification available.
Products specifications
Size 9/16 in
Weight Lbs/M 39.30
Plating Steel Zinc
Hardness Rockwell C38-45