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 6130-00-723-4119
NSN 6240-01-557-7463
NSN 7035-01-026-0117
NSN 5930-01-478-3123
NSN 6610-01-160-3770
NSN 5925-00-260-4298
NSN 6610-00-654-9877
NSN 6240-01-106-2447
NSN 6620-00-789-8684
NSN 5950-01-242-9896
NSN 5975-01-550-9006
NSN 2925-01-654-2478