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 5925-01-622-6708
NSN 5920-01-547-6517
NSN 5960-01-413-3877
NSN 5945-00-193-3534
NSN 5990-00-960-6310
NSN 6685-00-317-3221
NSN 6240-01-351-6729
NSN 6645-01-188-2918
NSN 6240-01-280-3382
NSN 5990-00-719-4947
NSN 5998-01-393-1715
NSN 2925-00-983-7521