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 6130-01-598-5205
NSN 5915-01-044-5260
NSN 5945-01-562-3292
NSN 2925-00-838-7164
NSN 2925-00-254-9776
NSN 5999-01-502-7101
NSN 7035-00-445-9657
NSN 6645-01-523-8809
NSN 6645-00-171-7101
NSN 5905-00-558-6556
NSN 5925-01-597-9576
NSN 6320-00-731-6134