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 5895-01-443-8194
NSN 7035-01-566-8130
NSN 5960-01-609-6565
NSN 6645-01-438-6986
NSN 5930-01-556-5648
NSN 6610-01-158-2988
NSN 5835-01-259-0859
NSN 6610-00-678-0350
NSN 6320-01-393-7022
NSN 6320-01-039-5891
NSN 5910-01-400-0891
NSN 5996-01-251-1149