Material Description: SAE J429 Grade 8 (1040 MPa minimum ultimate tensile strength) heat treated steel, inch fasteners. Locking Feature: Dimensions and tolerances for inch hexagon head bolts (sometimes referred to as hexagon head cap screws Head Height (mm): 7.9375 Hole Thread Pitch: 16 Stud Thread Pitch: 16 Stud Thread Size: .375 Coating: Electroplated Zinc with topcoat sealer, min of 5 micrometers thick, up to 96 hrs to white rust Overall Length (mm): 44.45 Thread Size (mm): .375 Drive (mm): 14.2875 Grip Length (mm): 12.7