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

#4 Heavy Duty Jobber Drill Bit

Common flute and overall length for minimal adjustment during tool changes

the zinc plating can help it perform durably and stand up against the elements over the long-term

18-8 stainless steel offers good corrosion resistance and machines easily but will over time stain in coastal environments

2-4 1/2 x 6 Socket Cap Screw Alloy A563 Grade A Heavy Hex Nuts Plain 1/4-20 x 1 3/8 Acorn2 4 1 2 x 6 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.