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 5975-01-341-7363
NSN 6645-00-276-7544
NSN 6150-00-133-5742
NSN 7035-01-421-4446
NSN 6610-00-420-3089
NSN 6135-01-529-0122
NSN 6240-00-826-8426
NSN 5950-01-025-6680
NSN 6610-01-098-8363
NSN 6620-01-224-4985
NSN 5930-00-658-0842
NSN 5935-01-466-1121