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 6685-01-163-3319
NSN 5930-00-188-9880
NSN 5985-01-435-5082
NSN 7035-01-026-1171
NSN 5915-01-519-2878
NSN 4140-01-386-4368
NSN 5895-00-657-1352
NSN 6110-00-921-8277
NSN 5960-00-266-6741
NSN 5855-00-281-3843
NSN 5935-00-410-9288
NSN 6610-01-127-0724