T=(0.5~0.7)*k*σs*Kaha*d/1000
Har'a bona,
T: torque e tiisang, Nm
k: coefficient ea matla a ho tiisa, hangata 0.12
σs: matla a tlhahiso ea thepa ea bolt, Mpa
Jwalo ka: sebaka se kotsi sa ho tšela, mm2
d: Bophara ba lebitso, mm

Hebei Chengyi Engineering Materials Co., Ltd. e ikemiselitse ho hlahisa le ho nts'etsapele li-fasteners tse fapaneng. Lihlahisoa tsena li sebelisoa haholo ho matla a motlakase, sebopeho sa tšepe, kaho, merafo, photovoltaic, mechini, lipalangoang, literene le masimo a mang. Sistimi ea tsamaiso e fa bareki tšebeletso e qaqileng, e tsotellang le e tiisitsoeng ea ho emisa hang.