29/64 x 12 High Speed Aircraft Bit Cobalt

7/8-9 x 1 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

1 3/8 x 17 ITM SDS Max X-Cutter Hammer Drill Bit

the hardness rating is HRC 24-35

Material is manufactured to meet or exceed ASTM A563 Grade A

5/8-11 x 12 Carriage Bolt 18-8 (A2) Stainless Steel Square Flat-Head Self Drilling Screws with Wings 410 Stainless Steel 29/64 x 12 High Speed5 8 11 x 12 Carriage Bolt SS 18 8 (A2) . 18 8 stainless steel carriage bolts are manufactured to meet or exceed ANSI B18. 5 and will have a typical composition of 18% chromium and 8% nickel. These percentages exist in 303, 304 and 305 series stainless steels so 18 8 is used at times to designate any and all of those alloy groups. 18 8 stainless steel offers good corrosion resistance and machines easily but will over time stain in coastal environments.