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 5855-01-150-9970
NSN 5835-01-177-0375
NSN 5950-01-621-2907
NSN 5925-00-972-0623
NSN 6645-01-594-1439
NSN 5910-00-419-0330
NSN 6645-00-279-1777
NSN 5915-01-025-0868
NSN 5990-00-277-3763
NSN 5950-01-537-4338
NSN 5905-00-030-5557
NSN 5905-01-217-8516