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 5925-01-494-5867
NSN 5895-00-209-9766
NSN 6610-01-039-0788
NSN 6620-01-197-3975
NSN 5990-00-741-9775
NSN 6610-00-935-7131
NSN 6150-01-135-2947
NSN 6320-01-326-1316
NSN 2925-01-294-0585
NSN 5950-01-050-8445
NSN 5920-00-822-2327
NSN 5950-01-103-2759