L9® High Tension SAE pattern flat washers are designed for use in high stress

the hardness rating is HRC 24-35

5/8-18 x 3 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25)

3/4-16 L9 Hex Nut Alloy Cadmium Yellow and Wax Coated Domestic USA (300)

1/2 x 1 3/4 (1/4 Drive) Magnetic Nut Setter

1/4 x 8 1/4 Powers Wedge-Bit™ SDS Shank SDS Plus Hammer Drill Bits L9® High Tension SAE patternPowers Wedge Bit SDS Shank is a robust and reliable tool to easily drill through tough materials such as concrete and tile. With a 1 4 inch diameter and 8 1 4 inch length, it delivers maximum efficiency with its shank optimized for greater performance and versatility.