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 5985-01-487-8805
NSN 6110-00-015-7688
NSN 6110-00-028-2064
NSN 5945-00-093-0817
NSN 5999-00-309-7893
NSN 5910-01-235-0703
NSN 6220-00-116-4289
NSN 6685-01-603-4559
NSN 5950-01-522-3161
NSN 6135-00-686-4777
NSN 5985-01-025-9711
NSN 6150-00-903-0479