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 5915-01-013-8995
NSN 6320-01-268-3072
NSN 5950-01-385-3490
NSN 5975-01-197-7673
NSN 6320-01-220-2264
NSN 5835-01-013-9321
NSN 5895-01-321-1849
NSN 5835-01-559-3824
NSN 5855-00-134-0569
NSN 5950-00-066-0941
NSN 6110-00-036-6386
NSN 5999-00-079-0772