ORFS raj pob ntsej muag loj yog raws li SAE J1453 lossis ISO 8434-3, xws li Standard tube nut (NA) thiab muaj zog raj hauv raj (NB).
ib lub cev me me.
b Chamfer los yog lub vojvoog pob tw hos ntawm L 45, ob hnub.
c Sab kaum, 1 hli max.
d Yuav tsum muaj cov cim qhia txog style B (siab zog); saib 4.3.
e ob sab.
f Tub Cube style A (NA) (txuj ci) tsis haum rau tooj liab braze sibtham.
g Tub txiv ntseej style B (NB) (high-strength) yog tsim rau txhua qhov kev sibtham.
h Rau lub tsho sab nraum daim diav 12 hli.
i Rau lub tsho sab nrauv> 12 hli.
j Kaum tawg.
