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 5950-01-262-5429
NSN 5975-00-153-7971
NSN 5945-01-023-7993
NSN 6105-01-542-5837
NSN 5996-00-850-9833
NSN 6620-00-469-2502
NSN 6135-00-016-0071
NSN 5905-01-350-7317
NSN 5950-00-111-2000
NSN 5998-00-815-7802
NSN 6240-01-231-9243
NSN 6135-01-525-1351