Hex Bolt Full Thread UNC 1/4 x 5/8 inch in A4 Stainless - ASME B18.2.1 / ASTM F593
Commonly referred to as a setscrew and longer versions are referred to in the United States as a tap bolt. A standard spanner or ratchet is typically used to fit this product. Used for decades on all types of assembly throughout the world. The hex drive allows a higher torque to be applied. Produced to ASME B18.2.1.