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 6320-01-631-7828
NSN 2925-00-350-8517
NSN 6220-00-104-5365
NSN 6145-01-502-5217
NSN 6135-01-512-8740
NSN 6240-01-627-7610
NSN 6145-01-439-3239
NSN 5910-01-130-2531
NSN 6220-00-227-8209
NSN 4140-00-653-5245
NSN 6110-00-239-5548
NSN 6320-01-177-3192