Mokhoa oa ho Fetolela lipakeng tsa Metric le Unified Inch Threads

Khoele ke sebopeho sa spiral se sebelisetsoang ho hokahanya liboutu le linate. Linaheng le libakeng tse fapaneng, ho sebelisoa litekanyetso tse fapaneng tsa khoele. Imperial le metric ke litekanyetso tse peli tse tloaelehileng.
Ka maemo a Brithani, Litlhaloso tse tloaelehileng ke UNC le UNF. UNC ke khutsufatso ea Unified National Coarse, e bolelang khoele e kopaneng ea naha e mahoashe; UNF ke khutsufatso ea Unified National Fine, e bolelang khoele e kopaneng ea naha. Ka mohlala, Unc 1/4-20 e bolela khoele e mahoashe ea naha e kopaneng e nang le sekontiri sa 20 TPI (likhoele ka ho kenella) le bophara ba 1/4 inch.

Likhoele tse kopantsoeng tsa inch li sebelisoa haholo linaheng tsa tsamaiso ea inch. Mofuta ona oa khoele o arotsoe ka lihlopha tse tharo: letoto la khoele e mahoashe UNC, letoto la lihlooho tse ntle tsa UNF, letoto la lihlooho tse ling tse ntle tsa UNFF, hammoho le letoto le tsitsitseng la UN.

Mokhoa oa ho tšoaea: Khoele bophara-palo ea likhoele ka inch; Letoto la ho nepahala ha khoutu

Mohlala: Letoto la meno a mahoashe 3/8-16 UNC-2A

Letoto le letle la meno 3/8-24 Unf-2a

Letoto la lihlooho tse ling tse ntle tsa meno 3/8-32 UNFF-2A

Letoto la molumo o tsitsitseng 3/8—20 UN—2A

Nomoro ea pele 3/8 e emela bophara bo ka ntle ba khoele ka lisenthimithara. Ho fetolela ho metric unit mm, atisa ka 25.4, ke hore, 3/8×25.4=9.525 limilimithara; palo ea bobeli le ea boraro 16, 24, 32, le 20 are Palo ea meno ka inch (palo ea meno ka bolelele ba 25.4mm); dikhoutu tsa mongolo ka mora nomoro ya boraro, Unc, Unf, UNFF, LE, ke letoto la dikhoutu, le linomoro tse peli tsa ho qetela, 2A, ke boemo ba ho nepahala.

Ho boletsoe ka mokhoa o kopantsoeng oa khoele hore boholo ba lebitso bo ka ba le lipalo tse fapaneng. Ka mohlala, 1/2 e na le 13 meno, 16 meno, 20 meno, le 32 meno. Tekanyetso e bolela seo 13 meno ke meno a mahoashe le 20 meno ke meno a matle. 28 meno ke meno a matle haholo; 16 meno le 32 meno ka bobeli a bitsoa molumo o tsitsitseng, e sa fapanang le meno a mahoashe le meno a matle.