Kayayyaki: Bakin Karfe Square Head Bolts
Abu: Anyi daga bakin karfe 304, waɗannan sukurori suna da kyakkyawan juriya na sinadarai kuma suna iya zama mai ɗanɗano mai ɗanɗano. Ana kuma san su da A2 bakin karfe.
Nau'in kai: Square head.
Length: ana auna shi daga ƙarƙashin kai.
Type nau'in: m zaren, kyawawan zare.Coesy threads shine matsayin masana'antu; zaɓi waɗannan sukurori idan ba ku san farar ko zaren kowane inch ba. Fitattun zaren zaren da ba su da kyau an ware su kusa don hana sassautawa daga girgiza; mafi kyawun zaren, mafi kyawun juriya.
Aikace-aikace: Kimanin rabin ƙarfin matsakaitan ƙarfi, ana iya amfani da waɗannan skru don aikace-aikacen ɗaurin aiki mai haske, kamar tabbatar da fa'idodin samun dama. Manya-manyan ɓangarorin lebur suna sauƙaƙa kama su da maƙarƙashiya da kiyaye su daga juyawa cikin ramukan murabba'i.
Ma'auni: Sukurori waɗanda suka hadu da ASME B1.1, ASME B18.2.1, suna bin ka'idoji don girma.