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 6320-01-274-8886
NSN 5985-01-239-5185
NSN 6130-00-299-6920
NSN 6145-01-634-0388
NSN 2925-00-163-9016
NSN 5935-01-243-1828
NSN 6320-00-731-6134
NSN 6620-01-528-0759
NSN 5935-01-364-8347
NSN 5985-00-232-2619
NSN 5925-01-227-6859
NSN 6240-00-635-9953