1/2 x 21 ITM SDS Max Hammer Drill Bit

7/16-20 x 3 1/2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (300)

Marine screws are locked in place thanks to their "teeth" (the thread indentations will resist back-out even after prolonged vibration)

0px Verdana} p

7/8-9 x 2 3/4 Grade 5 Hex Cap Screw Plain Domestic USA (60) Nylon Insert Locknuts 18-8 Stainless Steel 1/2 x 21 ITM SDS7 8 9 x 2 3 4 Grade 5 Hex Cap Screw Plain Domestic USA (60). 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 of