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 6220-00-044-5917
NSN 5910-01-487-3735
NSN 2925-01-578-7731
NSN 5905-01-118-0275
NSN 5985-01-045-5206
NSN 2925-01-307-7429
NSN 6130-01-432-5175
NSN 5855-01-340-6541
NSN 6645-01-202-7986
NSN 5855-00-327-2061
NSN 5998-00-753-1581
NSN 7035-01-055-6806