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 5996-01-457-9158
NSN 5895-00-265-0159
NSN 6135-01-303-0295
NSN 6620-01-052-2773
NSN 5925-00-404-0396
NSN 5835-01-471-5848
NSN 6220-01-359-4857
NSN 6130-01-257-2840
NSN 5855-01-611-2113
NSN 6135-01-088-4301
NSN 6320-01-312-3620
NSN 2925-01-346-9522