- Allen round head screws with internal hex, size 5/16-18x3/4" - Made of 304 stainless steel (18/8), offering maximum durability and corrosion resistance - Full UNC thread, thread diameter 0.3125 inches, length 3/4 inches - Pack of 25 units, ideal for DIY projects, machinery, automotive, and electronics - Dome head design and internal hex drive for greater torque and clamping force - Wide bearing surface and high tensile strength - Easy installation with hex key; use of a lock washer is recommended for added safety - Perfect as replacement parts and fasteners in industrial and manufacturing applications