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 5990-00-415-5351
NSN 5960-01-358-9733
NSN 6685-01-162-4291
NSN 5835-01-122-6951
NSN 5975-01-514-8114
NSN 6135-00-968-8594
NSN 5960-01-173-7956
NSN 6240-00-762-7456
NSN 5990-01-278-9985
NSN 6620-01-592-9890
NSN 5996-00-276-5480
NSN 5925-00-734-1441