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Controlled thread length allows the thread on this heavy hex head structural bolt to stop before the joint ply interface, to improve the fastener's direct shear performance.Specification: System of Measurement: InchItem: Structural BoltStructural Bolt Type: Structural BoltBasic Material: SteelMaterial Grade: A325 Type 1Fastener Finish: Hot Dipped GalvanizedDia./Thread Size: 1"-8Fastener Length: 4"Fastener Thread Type: UNC (Coarse)Fastener Industry Standards: ASTM F3125Thread Length: 1-3/4"Fastener Thread Direction: Right HandHead Dia.: 1-5/8"Head Height: 39/64"Tensile Strength (PSI): 105,000Rockwell Hardness: C25 to C34"