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 6685-00-229-3224
NSN 5920-01-582-0388
NSN 5910-01-262-9890
NSN 6320-00-731-6134
NSN 6645-01-502-3068
NSN 5935-01-551-7896
NSN 6110-01-356-8863
NSN 6650-01-472-5028
NSN 2925-01-407-4958
NSN 2925-00-142-0641
NSN 6145-01-153-7908
NSN 5855-01-633-4848