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 6240-01-608-4990
NSN 6645-00-269-2764
NSN 5950-01-603-3554
NSN 5960-00-570-6986
NSN 5935-01-474-4324
NSN 5996-01-578-8491
NSN 5999-01-568-0712
NSN 5999-01-201-2476
NSN 7035-00-111-4389
NSN 5965-01-258-5662
NSN 5905-00-171-2652
NSN 5960-00-553-5792