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 7035-01-146-7096
NSN 5855-01-544-9778
NSN 5920-01-082-7497
NSN 6130-01-466-2447
NSN 5950-00-584-4571
NSN 5935-00-006-5982
NSN 5935-01-174-3672
NSN 5998-00-401-1038
NSN 6620-01-130-5700
NSN 5999-01-364-8209
NSN 6220-01-492-5018
NSN 6610-01-476-7412