Washer gorofa
Nyenzo: chuma cha kaboni, chuma cha pua, shaba, nk.
Saizi: M2-M64, 1/4-2-1/2
Kiwango: DIN125, ASTM F436, ISO 7089, GB/T97
Maliza: Zinc nyeupe iliyowekwa, zinki ya manjano iliyowekwa, zinki ya bluu iliyowekwa, moto-dip, wazi, oksidi nyeusi, nk.