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 5915-01-364-1661
NSN 6645-01-289-2950
NSN 5910-00-738-9047
NSN 5855-01-409-1792
NSN 7035-01-057-6325
NSN 5999-01-463-8277
NSN 6610-01-275-0119
NSN 5990-00-964-6422
NSN 5960-01-244-6610
NSN 6110-00-035-8794
NSN 5895-01-411-6024
NSN 6145-00-042-3800