9/16-18 x 2 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (175)

1-8 x 1 1/4 Socket Set Screw Cup Point Alloy

10 x 3 1/2 Simpson Flat-Head Deck-Drive™ DWP Wood Screws - 6-Lobe Drive 316 SS - Deck Pack (250)

1-8 x 9 1/2 Grade 5 Hex Cap Screw Zinc Plated

They are widely used as plug gages

9/16-18 x 6 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (25) 7/8-9 Grade 8 Hex Cap Screws Plain - Domestic USA 9/16-18 x 2 1/2 Grade9 16 18 x 6 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (25) . Grade 8 Hex Cap Screws are manufactured in the USA from medium carbon alloy steel. In diameters 1 4 to 1 1 2 inches our Grade 8 material meets or exceeds SAE J429 Grade 8 specifications. Diameters over 1 1 2 inches meet or exceed ASTM A354 Grade BD. All material is manufactured with rolled threads. Yellow zinc plated bolting will meet or exceed ASTM F1941. Typical hardness on