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 6645-01-345-6828
NSN 5975-01-188-0012
NSN 6110-01-297-6810
NSN 5960-00-928-8365
NSN 6220-00-826-7002
NSN 5985-01-296-0581
NSN 7035-01-658-1623
NSN 5855-00-922-5689
NSN 6130-01-295-5344
NSN 2925-01-574-3246
NSN 5985-00-446-1021
NSN 5975-01-308-9474