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 5965-00-342-5126
NSN 5895-00-059-7516
NSN 5930-01-554-8586
NSN 5996-01-377-3743
NSN 5925-01-568-2807
NSN 5996-01-633-7979
NSN 6320-01-220-2264
NSN 6620-01-287-1443
NSN 4140-00-526-4505
NSN 6135-01-052-9634
NSN 6135-00-556-8318
NSN 5990-01-423-8189