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 5985-01-059-0694
NSN 6105-01-236-5290
NSN 6135-01-041-3829
NSN 7035-00-803-3056
NSN 5950-00-802-4211
NSN 5895-01-241-9924
NSN 6130-01-469-6508
NSN 5930-01-500-1199
NSN 5945-00-999-0214
NSN 5950-01-580-0598
NSN 5915-01-394-5150
NSN 5895-01-650-1776