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 6135-01-272-6039
NSN 4140-01-205-6261
NSN 5930-01-444-6885
NSN 5935-01-524-7515
NSN 6610-01-397-6965
NSN 6150-01-215-0311
NSN 6610-01-456-5234
NSN 2925-01-364-7926
NSN 5998-01-627-8911
NSN 6645-01-391-9820
NSN 5950-01-550-7685
NSN 6320-01-624-0193