Taiwan Provincial Standard of the People's Republic of China
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CNS 4238-1981
Scope
This standard applies to the machining accuracy and tolerance requirements for bolts, screws, screw piles, and nuts (hereinafter collectively referred to as screws and nuts). Screws and nuts not included in this standard can, in principle, refer to this standard.
CNS 4238-1981 history
1981CNS 4238-1981 Finishes and Tolerances of Bolts, Screws, Studs, and Nuts