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 6110-00-678-1954
NSN 4140-01-156-9980
NSN 5965-01-179-7749
NSN 6145-01-607-6165
NSN 6650-00-935-4247
NSN 5895-01-520-5755
NSN 5925-01-429-7699
NSN 6110-00-100-4775
NSN 5910-00-900-1103
NSN 5910-00-934-8311
NSN 5975-01-424-6359
NSN 5895-00-763-1161