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 5965-01-408-6218
NSN 4140-01-334-9043
NSN 6645-01-629-9657
NSN 6685-00-203-4485
NSN 5935-00-405-8371
NSN 5975-01-575-3660
NSN 6130-00-952-2970
NSN 7035-00-834-2090
NSN 6620-01-127-5389
NSN 5990-00-609-4279
NSN 6130-00-596-9565
NSN 6145-01-246-7506