fine threads and the self drilling tip make these screws ideal for penetrating and holding into metal framing studs and other types of metal or aluminum framing

A307 Grade A Carriage Bolts are manufactured from low carbon steel to meet or exceed ASTM A307 Grade A

1/4-20 x 1 3/8 Acorn Sleeve Anchor Zinc Plated (100)

9/16-12 x 6 Grade 8 Hex Cap Screw Yellow Zinc Plated

#56 Heavy Duty Jobber Drill Bit

1 1/8-12 x 5 Socket Cap Screw Alloy Cap Nuts Nickel Plated fine threads and the self1 1 8 12 x 5 Socket Cap Screw Alloy . Alloy Socket Head Cap Screws from Brighton Best. Hardness of RC 38 43, meets or exceeds ASTM A574. Manufactured from heat treated alloy steel, 1960 series.