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 4140-01-411-5908
NSN 6105-01-456-1243
NSN 5935-01-154-3819
NSN 5895-00-362-1606
NSN 5990-01-113-8121
NSN 6220-01-331-8206
NSN 5960-01-371-9143
NSN 5990-00-844-1188
NSN 5960-01-346-3377
NSN 6320-00-036-3688
NSN 6105-01-137-8046
NSN 5965-01-104-5102