#4 Heavy Duty Drill Bit - Stubby Length

10 x 3 1/2 Simpson Bugle-Head Wood Decking Screws - Square Drive T17 316 SS - 5 lbs Pack (270)

1-14 x 3 1/4 Grade 8 Hex Cap Screw Yellow Zinc Plated

Typical hardness is HRB 70-100

3/8-16 x 4 1/2 Hex Tap Bolt Silicon Bronze

3/8-16 x 6 Hex Tap Bolt Silicon Bronze 5/16-18 Hex Tap Bolts Silicon Bronze #4 Heavy Duty Drill Bit3 8 16 x 6 Hex Tap Bolt Silicon Bronze. Silicon Bronze Hex Tap Bolts are similar to low carbon steel in hardness but offer high resistance to corrosive environments such as sea water, gases, sewage and atmospheric conditions. Commonly used in naval construction and power plant applications.