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 5950-01-390-4064
NSN 5935-01-422-8189
NSN 6650-01-014-0931
NSN 6320-01-558-8844
NSN 5930-01-523-3712
NSN 5835-01-010-3103
NSN 6135-01-231-4809
NSN 6320-01-162-5977
NSN 5985-01-503-5181
NSN 6620-00-491-3818
NSN 5920-01-167-9026
NSN 5965-01-100-1195