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 5915-00-103-7552
NSN 6110-01-141-4496
NSN 5999-01-631-2884
NSN 6220-01-163-4901
NSN 5996-01-021-0143
NSN 6150-01-061-1240
NSN 5935-01-438-8577
NSN 5960-01-350-2925
NSN 6110-01-577-0286
NSN 2925-01-180-7793
NSN 5895-01-205-7681
NSN 5975-01-288-2897