Hex Head Setscrews ISO 4017 (DIN 933) M39 in Bright Zinc Plated (BZP) Class 8 high tensile steel

Commonly referred to as a setscrew or simply as a bolt. The fully threaded ISO 4017 or DIN 933 should not be confused with it's DIN 931 equivalent. A standard spanner or ratchet is typically used to fit this product. Used for decades on all types of assembly throughout the world. As with the DIN 931 hex bolt, the hex drive allows a higher torque to be applied.