These are partially threaded hex cap screws with all dimensions conforming to DIN 931

1-8 x 4 1/2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (10)

8 x 2 1/4 Simpson Fiber-Cement Screws T17 316 SS - Carton (1000)

#30 x 6 High Speed Aircraft Bit Cobalt

3/8-24 x 7/8 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (1000)

3/8-16 x 2 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100) 1/2 Cotter Pins Plain Steel These are partially threaded hex3 8 16 x 2 3 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100) . Grade 5 Hex Cap Screws are manufactured in the USA from medium carbon steel. Our Grade 5 material meets or exceeds SAE J429 Grade 5 specifications. All products are manufactured with rolled threads. Typical hardness on diameters 1 4 to 1 inch is HRC 25 34. On diameters over 1 inch to 1 1 2 hardness will range from HRC 19 30. Tensile strength for diameters 1 4 to 1 inch is a minimum