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 5950-01-424-0257
NSN 2925-01-159-8312
NSN 5996-00-461-2109
NSN 5950-01-302-1101
NSN 6145-00-451-6651
NSN 6610-00-581-0771
NSN 5855-01-275-3111
NSN 5930-01-652-5312
NSN 6130-00-683-1011
NSN 5965-00-805-0985
NSN 5905-01-377-3638
NSN 5855-00-494-9581