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 4140-00-505-1684
NSN 5990-00-116-6590
NSN 5855-01-486-9924
NSN 5835-00-827-1904
NSN 5910-00-823-1068
NSN 6130-01-267-6123
NSN 6145-01-568-6587
NSN 6130-00-573-8807
NSN 5975-01-571-1514
NSN 6620-00-363-7528
NSN 5895-01-148-3833
NSN 6145-01-487-1985