Fastener

A v-belt is a unique mechanical linkage with a cross-section that resembles an isosceles trapezoid. The v-belt and its complementing pulley create the most efficient belt drive known (sometimes achieving 98% transmission efficiency). V-belts were developed in the early days of automobile innovation to improve belt reliability and torque transmission from the crankshaft to rotating assemblies. V-belts remain a common type of serpentine belt today.

GATES, DUNLOP, NOK, BANDO FENNER, HILTON, Browning John Deere  AND OTHER BRANDS

Machine screws with a thread cutting (self tapping) point. ... Hex Bolts Bolts with a hexagonal head with threads for use with a nut or tapped hole. ... Socket Screws Socket ... Acorn nuts are a high crown type of cap nut, used for appearance.