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 5975-01-335-5848
NSN 5965-01-364-7275
NSN 5998-00-684-8186
NSN 5990-01-088-5293
NSN 2925-00-546-3129
NSN 5985-00-225-9475
NSN 5855-01-288-6341
NSN 4140-00-400-4872
NSN 6685-00-402-2458
NSN 5985-00-902-3348
NSN 5915-01-222-0879
NSN 5930-00-143-4582