Material is steel, federal standard no. 66; steel no.S 1008 to 1022
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 5835-01-336-1153
NSN 5920-00-100-2582
NSN 5835-01-266-4382
NSN 5895-01-141-1805
NSN 5855-01-301-0158
NSN 5965-01-142-1807
NSN 5855-01-208-1471
NSN 6645-00-183-8812
NSN 4140-00-862-5644
NSN 6145-01-353-7407
NSN 5910-00-203-5603
NSN 5960-00-452-6043