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 5855-01-248-5725
NSN 5920-00-161-4564
NSN 6645-01-251-7887
NSN 5920-00-201-4914
NSN 6145-01-364-0346
NSN 5990-00-865-8002
NSN 6320-01-448-6265
NSN 6110-01-152-0426
NSN 5910-00-400-5952
NSN 6610-01-194-3759
NSN 6685-00-186-9190
NSN 7035-01-554-2582