Thread Specifications: 1/2"-13 UNC (Unified Coarse Thread) with full threading over 2" length for maximum engagement; 13 threads per inch for strong hold in tapped holes or nuts.
Dimensions: Nominal diameter 0.5 inches; hex head across flats 3/4" (for 1-1/8" wrench); overall length 2 inches; chamfered end for easy insertion.
Material and Finish: Low-carbon steel (ASTM A307 Grade A or B) with yellow zinc plating (ASTM B633 Type II) for corrosion resistance in indoor/outdoor dry-to-moderate environments; tensile strength 60,000 PSI minimum.
Design Elements: Six-sided hex head for high torque (up to 50 ft-lbs); no washer face (standard for machine bolts vs. cap screws); precise threading to ASME B18.2.1 standards.