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 5985-01-435-7088
NSN 4140-00-690-5288
NSN 5975-01-111-8477
NSN 7035-00-834-2090
NSN 2925-00-398-0253
NSN 5915-01-463-8413
NSN 2925-00-400-5634
NSN 6645-01-400-1137
NSN 5960-01-088-6553
NSN 5920-00-519-7664
NSN 6130-01-583-8255
NSN 6320-01-232-4664