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 6130-01-123-9041
NSN 6320-00-036-3688
NSN 6620-01-186-4374
NSN 5930-00-398-7477
NSN 7035-01-082-0311
NSN 6620-01-143-2569
NSN 5855-01-648-2674
NSN 6150-01-262-9606
NSN 5905-01-456-4768
NSN 6685-01-594-6298
NSN 5905-01-323-5836
NSN 6650-01-535-1120