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 2925-00-075-2714
NSN 5925-01-442-6487
NSN 5905-01-394-3728
NSN 6650-01-290-1029
NSN 7035-01-027-2259
NSN 5990-01-492-6575
NSN 6685-01-453-7894
NSN 6610-01-467-7068
NSN 5920-01-063-5769
NSN 5996-01-445-7547
NSN 5990-01-320-1412
NSN 6685-01-441-4170