UNF 1/2" Sechskantschraube Madenschraube hochfest 8,8 selbstfärbend schwarz

CARBON SELF COLOUR High Tensile, UNC Hex Bolts and Hex Sets. UNC and UNF high tensile standard is marked with an, '5'. A screw is fully threaded from underneath the head and a bolt is partially threaded (has a part-plain shank/ shoulder).

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