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 5855-01-210-0503
NSN 5895-01-224-9011
NSN 6645-01-400-1137
NSN 5925-01-170-7899
NSN 2925-00-759-5465
NSN 5998-01-361-9290
NSN 5930-00-676-2553
NSN 6220-00-551-7516
NSN 5930-01-396-3029
NSN 2925-01-187-5480
NSN 5975-01-135-0694
NSN 5930-01-500-7349