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 6110-01-633-9660
NSN 6135-01-110-8022
NSN 5855-00-337-3679
NSN 5905-01-230-0553
NSN 6220-00-079-0178
NSN 5905-01-272-3004
NSN 6650-01-352-7111
NSN 5990-01-003-4209
NSN 6110-01-615-9705
NSN 5905-01-149-4033
NSN 5920-01-195-7563
NSN 6130-01-463-8672