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 5999-01-560-1188
NSN 6150-00-548-3228
NSN 5920-01-548-9521
NSN 5930-00-182-7617
NSN 5930-00-439-3546
NSN 2925-01-342-1712
NSN 5965-01-038-5994
NSN 5950-01-604-9228
NSN 5910-01-055-5620
NSN 6145-01-647-4096
NSN 5998-01-584-9346
NSN 5965-01-624-6408