N.H.T.就是nh 螺纹,主要是用在管接头上的,在 NFPA 1963 标准中叫做NH转载请注明出自六西格玛品质论坛 https://bbs.6sq.net/,本贴地址:https://bbs.6sq.net/viewthread.php?tid=181082
NH----Standard hose coupling threads of full form as produced by cutting or rolling;
NHR----standard hose coupling threads for garden hose applications where the design utilizes thin walled material which is formed to the desired thread.
NPSH---Standard straight hose coupling thread series in sizes 1/2 to 4 inches for joining to American National Standard taper pipe threads using a gasket to seal the joint.转载请注明出自六西格玛品质论坛 https://bbs.6sq.net/,本贴地址:https://bbs.6sq.net/viewthread.php?tid=181082