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 5935-01-072-9212
NSN 5960-00-280-8629
NSN 6220-01-186-2529
NSN 6220-01-113-8210
NSN 6110-00-307-8480
NSN 5960-01-412-0619
NSN 6610-00-514-7773
NSN 6145-00-482-9546
NSN 5925-00-966-5836
NSN 5999-00-042-5355
NSN 6620-00-468-6059
NSN 5996-01-591-8882