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 5998-01-013-2053
NSN 5965-01-167-8513
NSN 5950-00-558-8483
NSN 6320-01-204-2922
NSN 5905-01-525-0153
NSN 6650-00-464-6395
NSN 5960-01-487-6436
NSN 6620-01-430-2212
NSN 6240-01-261-4958
NSN 6685-01-601-4686
NSN 5855-01-020-7982
NSN 6240-01-029-5988