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 6150-01-072-2275
NSN 6220-01-245-3264
NSN 5925-01-050-6571
NSN 5990-00-851-5778
NSN 6110-00-925-5455
NSN 5935-01-452-3921
NSN 5930-01-087-1232
NSN 5975-01-323-6361
NSN 5960-01-096-4588
NSN 5960-00-539-2253
NSN 5945-01-487-7694
NSN 2925-01-112-6822