B1821 Hex Head Bolts

Military Standard ASME B18.2.1.BH

B1821 Bolts are hex cap screws with either a UNC-2A Coarse Thread or a UNF-2A Fine Thread. The series has many options for length and thread diameter as well as features such as drilled or undrilled heads. B1821 Bolts adhere to strict military standards for material and construction. B1821 steel bolts have a tensile strength of 150,000 psi which is equivalent to Grade 8 steel screws. B1821 Bolts are cadmium plated to resist corrosion in wet environments. Length is measured from under the head. Material is Alloy Steel to ASTM A354BD. Finish is Zinc Yellow Plating to ASTM B633.