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 6645-01-144-8627
NSN 5965-01-464-0220
NSN 5965-00-150-1144
NSN 6220-00-937-1321
NSN 5990-00-972-1404
NSN 4140-01-448-7276
NSN 5985-00-962-0032
NSN 6685-01-365-2720
NSN 5935-00-246-5280
NSN 6610-00-365-4454
NSN 6320-01-550-3420
NSN 5975-00-781-9812