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 5925-01-256-1833
NSN 5950-00-457-2537
NSN 6135-01-260-7180
NSN 7035-00-275-5604
NSN 5990-00-014-2310
NSN 5910-01-564-9266
NSN 5999-01-465-2163
NSN 5855-00-198-3197
NSN 5975-01-139-6797
NSN 5925-00-584-6298
NSN 5965-01-604-0220
NSN 5895-01-177-2539