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

1/2 x 18 High Speed Long Boy

9/16-18 x 2 Socket Cap Screw Alloy

5/8-11 x 6 Hex Sleeve Anchor Zinc Plated (10)

5/8-11 x 4 1/2 Simpson Wedge Anchor 304 SS (20)

9/16 x 18 High Speed Long Boy (1/2" Shank) Wedge Anchors 304 Stainless Steel USS pattern flat washers are9 16 x 18 High Speed Long Boy (1 2" Shank) . Straight shank to 1 2 1 2 reduced shank for sizes above 1 2 M2 high speed steel Sharp cutting edge to drill in many different materials: Mild Steel Cast Iron Aluminum Wood Extra length flute with continuous cutting edges for drilling deep holes and fast chip removal Reduced shank fits all drill motors with 1 2 chucks Non slip grip prevents the bit from spinning in the chuck