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 5920-01-426-8517
NSN 6130-01-515-1094
NSN 5895-01-401-5388
NSN 5965-01-633-4899
NSN 5925-01-281-8076
NSN 5930-01-119-4205
NSN 5895-01-184-3803
NSN 5895-00-059-7516
NSN 5910-01-492-6028
NSN 6150-01-359-4876
NSN 7035-01-510-8703
NSN 6620-00-104-6937