Hex head cap screws and flat head slotted cap screws meet specific dimensional specifications and are often used in precise applications where tight tolerances are required. The flat slotted head is preferred over the hex head when head clearance is a concern. Hex Head Flat washer face bearing surface under the hex head that meet specific specifications as described by ASME B18.2.1 Features 225 Piece Specifications Size: 1/2-13 x 3 Thread Size: 1/2-13" Material: Aluminum Drive Style: External Hex Head Style: Hex Head Thread Style: Right Hand Weight: 18 lbs - SKU: APFN188731

Hex head cap screws and flat head slotted cap screws meet specific dimensional specifications and are often used in precise applications where tight tolerances are required. The flat slotted head is preferred over the hex head when head clearance is a concern. Hex Head Flat washer face bearing surface under the hex head that meet specific specifications as described by ASME B18.2.1 Features 225 Piece Specifications Size: 1/2-13 x 3 Thread Size: 1/2-13" Material: Aluminum Drive