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 6130-01-443-5644
NSN 6220-00-050-0191
NSN 5910-00-461-9612
NSN 5920-01-572-0246
NSN 5990-00-741-9775
NSN 6645-01-642-3637
NSN 5905-01-528-7879
NSN 5835-00-484-1529
NSN 6620-01-367-2597
NSN 6240-01-525-6585
NSN 5990-01-658-9964
NSN 5960-01-063-6846