800.877.2907 Building Strong Relationships Since 1961

OTHER SIZES AVAILABLE (Please Call)

OTHER SIZES AVAILABLE      (Please Call)The ASTM A307 specification covers mild steel bolts.

A307 Grade B Heavy Hex Bolts are intended for use in flanged joints in piping systems with cast iron flanges. These bolts are usually mated with plain steel low carbon Heavy Hex Nuts when required.