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 5935-01-648-6463
NSN 5999-00-126-5996
NSN 5915-01-097-0955
NSN 5965-01-574-3508
NSN 5999-01-388-0108
NSN 5910-01-560-7804
NSN 6145-01-090-1086
NSN 5935-00-720-8335
NSN 5950-01-231-4420
NSN 6110-01-501-7790
NSN 6105-00-023-7160
NSN 5855-01-100-3272