USS pattern flat washers are manufactured from low carbon steel to meet ASTM F844

1/4 x 2 1/2 Flat Split Drive Anchor Zinc Plated (100)

3/4-10 x 10 Grade 8 Hex Cap Screw Yellow Zinc Plated

Threaded studs are set by tightening the nut

It is manufactured from 18-8 (A2) Stainless Steel

5/8-18 x 2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (25) ThruLOK Screws Bolt Fastening System USS pattern flat washers are5 8 18 x 2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (25) . L9 High Tensile Strength Hex Cap Screws are designed for use in high stress, severe service environments. The highest mechanical strength off the shelf fastening system available, its special features control torque tension characteristics to develop high clamp loads when using properly controlled tightening methods. Brighton Best manufactures L9 bolting from AISI alloy steels. L9