Heavy Hex Bolts have hexagonal heads and externally threaded mechanical device designed for insertion through holes in assembled parts to mate with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.
Standard:
ASTM A325, ASTM A325M, A490, A490M, ASTM 307B,
ASTM A354, DIN 6914, EN 14399-3, EN 14399-4, BS 4395