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 5985-01-145-5337
NSN 6620-01-411-5750
NSN 5965-00-233-3851
NSN 5895-01-533-6224
NSN 6320-00-937-5625
NSN 5925-01-110-6329
NSN 5975-00-009-6256
NSN 5835-00-233-6327
NSN 6320-01-067-0474
NSN 5910-00-450-4815
NSN 6320-01-519-0916
NSN 7035-00-117-0418