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 5925-00-988-7439
NSN 6650-01-445-7250
NSN 5945-00-888-0417
NSN 6650-01-196-4667
NSN 6650-01-151-3429
NSN 5999-01-549-0285
NSN 6145-01-101-6178
NSN 6130-01-537-3247
NSN 6650-01-183-0711
NSN 5996-00-132-1360
NSN 6620-01-417-3314
NSN 6685-01-111-1583