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 5895-00-722-1084
NSN 6135-01-134-7222
NSN 5930-01-023-7293
NSN 5950-01-160-5410
NSN 5915-00-349-2198
NSN 5910-01-065-8243
NSN 5920-01-127-5300
NSN 6135-01-551-0562
NSN 7035-01-129-7834
NSN 5950-00-753-9451
NSN 6320-01-170-4068
NSN 6320-00-539-9283