• Ohun elo: Erogba, irin, irin alagbara, idẹ. • Ori iru: alapin/countersunk, pan, Double Flat, ori wafer, CSK pẹlu 4(6) awọn iha • Ipari: zinc plated, Black Oxide, Nickel, Rupert, Dacromet, ati bẹbẹ lọ• lStandard: DIN7505 • Iwon: M3-M8