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 5895-01-235-8073
NSN 6240-01-613-2503
NSN 6685-01-166-7738
NSN 6110-01-122-5916
NSN 5985-01-602-1465
NSN 5895-01-121-8159
NSN 6110-01-475-8275
NSN 5999-00-448-5675
NSN 5999-01-609-3456
NSN 7035-01-103-3342
NSN 5915-01-381-6547
NSN 2925-01-030-6580