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 5835-00-085-2287
NSN 6110-01-422-3783
NSN 6150-00-062-1147
NSN 5855-00-757-5149
NSN 5895-00-319-8451
NSN 5996-00-082-0320
NSN 5985-00-019-0171
NSN 5950-01-169-6461
NSN 6220-00-288-4350
NSN 6650-00-804-2039
NSN 6320-01-629-1277
NSN 6135-01-167-7604