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 6135-00-866-2311
NSN 6320-00-809-5744
NSN 6610-01-207-0045
NSN 5996-01-291-3076
NSN 5960-00-692-2887
NSN 5975-01-336-3772
NSN 5935-00-258-3034
NSN 5920-00-081-9156
NSN 5910-01-020-7700
NSN 5985-01-191-4150
NSN 5950-01-139-4371
NSN 7035-00-281-4082