With Grade 5 steel construction, these hex head cap screws offer strength and moderate flexibility. - The thick, hexagonal head design is engineered for tightening with a wrench. - Use in pretapped holes or with nuts. - Grade 5 steel is hardened, yet more malleable than Grade 8, allowing the screws to withstand shear force Material / Steel Material Grade/Class / Grade 5 Finish / Zinc Plated Thread Size / 3/4"-10 Thread Direction / Right Hand Fastener Length / 2 1/2 in Minimum Thread Length / 2 1/2 in Head Width / 1 1/8 in Head Height / 15/32 in Drive / Hex Drive Size / 1 1/8 in Tensile Strength / 105,000 psi Rockwell Hardness / HRC19 Dimensional Standards / ASME B18.2.1 Material Quality Standard / SAE J429 System of Measurement / Inch Overall Length / 2 1/2 in Thread Fit / 2A Thread Style / Fully Threaded Type / Hex Head Cap Screw Head Style / Hex Thread Pitch / Fully Threaded Thread Type / Coarse