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 5910-01-134-2839
NSN 6130-01-660-1864
NSN 6610-00-847-8604
NSN 5960-01-141-6489
NSN 6320-01-335-8336
NSN 5998-00-275-2145
NSN 5910-00-969-2460
NSN 5905-00-400-9109
NSN 5985-01-415-5785
NSN 5965-01-231-9125
NSN 5895-00-105-5204
NSN 5975-01-579-7695