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

Hebei Chengyi Engineering Materials Co., Ltd. e ikemiselitse ho hlahisa le ho nts'etsopele ea li-fasteners tse fapaneng. Lihlahisoa li sebelisoa haholo ka matla a motlakase, mohaho oa tšepe, kaho, merafo, photovoltaic, mechine, lipalangoang, terene le masimo a mang. Sistimi ea tsamaiso ho fa bareki ts'ebeletso e felletseng, e tsotellang le e netefalitsoeng.