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 5998-00-421-9776
NSN 5905-01-556-4408
NSN 5945-00-647-2995
NSN 5855-01-525-7608
NSN 7035-01-492-1101
NSN 5930-01-025-3109
NSN 6645-01-101-4957
NSN 6620-01-230-0197
NSN 5935-01-175-6083
NSN 5996-01-566-0344
NSN 5965-01-122-7477
NSN 6650-01-579-6231