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 5965-01-382-4863
NSN 6220-00-940-0625
NSN 6145-01-521-8453
NSN 5945-01-429-4029
NSN 5996-00-084-6413
NSN 5990-00-821-6257
NSN 5975-00-549-9431
NSN 6685-00-481-9852
NSN 5945-00-861-2848
NSN 6135-01-278-9717
NSN 5999-01-106-5426
NSN 5905-01-124-9615