A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6110-00-144-6763
NSN 5895-01-121-4435
NSN 6620-01-100-3181
NSN 5975-01-483-0504
NSN 6135-01-581-8163
NSN 5965-01-605-4703
NSN 6145-00-699-8963
NSN 5920-00-081-9156
NSN 7035-01-122-1264
NSN 6150-01-298-5726
NSN 6650-01-184-9238
NSN 5965-01-421-1244