
Ọkpụrụkpụ nke agba zinc passivation film bụ 8-15μm, nnu ịgba ule ihe karịrị 72 awa, na ọdịdị bụ egwurugwu-acha. Mgbe ejiri passivation chromium trivalent, ọrụ nchekwa gburugburu ebe obibi dị mma.
Isi bụ ihe na-eme ka ọkpụkpụ cross-groove countersunk, nke nwere ike zoo n'elu nrụnye iji mee ka elu dị larịị. Dayameta mkpọpu ihe dabara na dayameta eri (dị ka ST4.2 drill bit dayameta 4.2mm), nke kwekọrọ na ọkọlọtọ GB/T 15856.1-2002.
Ụlọ ọrụ anyị na-emepụta ma na-ere ihe dị iche iche ike bolts, hoops, fotovoltaic ngwa, ígwè arụnyere akụkụ, wdg.