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 5950-01-278-7180
NSN 6150-01-555-9475
NSN 5985-00-336-1095
NSN 5999-01-141-9122
NSN 5925-01-483-5199
NSN 6145-00-406-4471
NSN 6645-01-500-0827
NSN 5925-00-001-7446
NSN 6145-01-152-2417
NSN 5930-01-601-1330
NSN 6320-01-652-3806
NSN 6145-01-203-7624