Ngwaahịa aha DIN 912 Cylindrical Socket Cap Screw/Allen boltỌkọlọtọ DIN912, GB70Ọkwa ígwè: DIN: Gr.8.8, 10.9, 12.9;SAE: Gr.5, 8;Na-emecha Zinc (Yellow, White, Blue, Black), Hop Dip Galvanized (HDG), Black Oxide, Geomet, Dacroment
OKWUKWU SOCKET: skru okpu oghere nwere obere isi cylindrical nwere akụkụ kwụ ọtọ ogologo.Allen (hex soket) draịva bụ ezumike nwere akụkụ isii maka iji eriri allen (igodo hex).