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 6110-00-343-1618
NSN 6650-01-503-4469
NSN 6130-00-202-4688
NSN 6220-00-961-7246
NSN 2925-00-918-0859
NSN 5920-01-298-9370
NSN 5835-01-593-7579
NSN 5835-00-690-8898
NSN 5905-01-139-2989
NSN 5905-01-231-5149
NSN 6645-01-025-1002
NSN 6620-01-246-4314