SAE J1231 Dimensions thiab Tolerances xws li hexagons, xov, qhov ntau thiab tsawg, qhov drilled qhov, cov ntsiab lus, contour, ncaj xov thiab lwm yam. Cov ntsiab lus raws li nram no:
Hexagons qhov ntev ntawm qhov ntev: Qhov tsawg tshaj plaws ntawm cov ces kaum ntawm sab nraud hexagons yuav tsum yog 1.092 lub sij hawm qhov dav dav thoob plaws cov flats, tab sis yuav tsum tsis txhob tshwm sim rau sab nrawm ntawm tsawg tshaj li 0.43 zaus qhov dav dav dav thoob plaws flats.
Kev kam rau tag nrho cov qhov ntev tsis txwv tsis pub tshaj tawm yuav tsum yog 0.25 hli. Angular kam rau ntawm txoj kab ntawm qhov xaus ntawm lub luj tshib yuav tsum yog 2.50 degrees rau qhov ntau thiab tsawg li 9.52 hli thiab ± 1.50 degrees rau qhov loj me tshaj 9.52 hli.
Kev kam nyob ntawm lub qhov taub: qhov pom zoo raws li cov laam nyob hauv lub rooj seem (Cov ntxhuav 3, 4, thiab 5) yuav tsum ua raws li Table 1:
Kev Zaj Rau Kev Tso Siab: hauv ncaj fittings yog machined los ntawm rov qab xaus, qhov offset ntawm lub rooj sib tham yuav tsum tsis tshaj 0.40 hli.
Cov kev pom zoo ntawm cov pa yuav tsum yog nyob ntawm cov chaw tsim khoom los ntawm cov kev ntsuas cov txheej txheem thiab cov kev pab cuam ntawm cov fittings tsis yog qhov tsis taus.
Cov Ncauj Lus Ncaj Ntaus Ncig Qib 2A sab nraud thiab Chav Kawm 2B sab nrauv yuav tsum siv rau cov seem tiav (tsis paub) fittings muaj ncaj threads uas tau xaiv A1 hauv daim duab 3 thiab Table 5.
Taper yeeb nkab txhawm rau txhim kho A hauv Daim 2 thiab Cov Txheej Txheem 4 yuav tsum ua raws li Dryseal American Standard Taper Thread Thread (NPTF). Specifications yog muab rau hauv kev nthuav dav hauv SAE J476. Ntawm tus neeg yuav khoom xaiv, txoj hlua xov yuav ua kom luv dua raws li SAE Short Dryseal Taper Pipe Thread (PTF-SAE Short).
