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 5895-01-127-4798
NSN 5945-01-608-6877
NSN 5965-01-456-6622
NSN 5975-01-650-5581
NSN 5985-01-500-1898
NSN 5990-00-165-1809
NSN 6150-01-655-6451
NSN 6105-01-364-4025
NSN 7035-00-064-7008
NSN 6135-01-104-3790
NSN 6130-01-303-7155
NSN 6130-00-130-1156