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 5835-00-113-6090
NSN 6620-01-504-5756
NSN 6110-01-022-9980
NSN 2925-01-338-7126
NSN 6645-00-880-8045
NSN 6620-01-030-0525
NSN 5935-00-802-2510
NSN 7035-00-803-3056
NSN 5920-01-266-0290
NSN 6110-01-582-7169
NSN 6110-00-801-8032
NSN 5999-01-025-9717