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 5855-01-475-4454
NSN 5915-01-025-6169
NSN 5915-01-025-0346
NSN 6240-00-224-5323
NSN 5925-01-586-0232
NSN 2925-01-290-8208
NSN 6110-01-036-5485
NSN 5915-00-299-2105
NSN 5895-01-338-3032
NSN 6135-01-177-3552
NSN 5855-01-276-0353
NSN 5835-00-733-9145