• Materyal: Carbon steel, hindi kinakalawang na asero, tanso.
• Uri ng ulo: flat/countersunk, pan, Double Flat, wafer head, CSK na may 4(6) na tadyang
• Tapos: zinc plated, Black Oxide, Nickel, Rupert, Dacromet, at iba pa
• lPamantayan: DIN7505
• Sukat: M3-M8