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 5996-00-117-4337
NSN 5950-00-081-3155
NSN 5835-00-763-2938
NSN 5990-01-362-7532
NSN 6240-00-446-7796
NSN 5905-00-129-6554
NSN 2925-01-588-3507
NSN 4140-01-442-0204
NSN 6150-01-628-7589
NSN 5895-01-540-9322
NSN 6620-01-068-4498
NSN 5998-00-243-7459