acceptable for ACQ pressure treated lumber

tie-wire or slotted hex head styles

3/4-10 x 6 1/4 Hex Sleeve Anchor Zinc Plated (5)

the hardness rating is HRC 24-35

1-8 x 3 Grade 8 Hex Cap Screw Yellow Zinc Plated

5/8-11 x 12 Carriage Bolt 18-8 (A2) Stainless Steel Square Flat-Head Self Drilling Screws with Wings 410 Stainless Steel acceptable for ACQ pressure treated5 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.