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 5910-01-500-1977
NSN 6130-00-721-4156
NSN 7035-00-803-3056
NSN 5925-01-393-3463
NSN 5990-00-683-1095
NSN 5950-00-956-9131
NSN 2925-01-359-9818
NSN 6650-00-966-5205
NSN 5855-01-278-8922
NSN 4140-00-139-5396
NSN 4140-00-830-9515
NSN 6105-00-418-9648