• Ihe: Carbon ígwè, igwe anaghị agba nchara, ọla. • Ụdị isi: flat/countersunk, pan, okpukpu abụọ, isi wafer, CSK nwere ọgịrịga 4(6) • Mechaa: zinc plated, Black Oxide, Nickel, Rupert, Dacromet, na ndị ọzọ• lọkọlọtọ: DIN7505 • nha: M3-M8