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 5920-01-056-4540
NSN 6685-01-583-0212
NSN 5905-00-888-7905
NSN 2925-00-343-3235
NSN 5905-01-381-6386
NSN 5920-01-336-2259
NSN 6685-01-142-6460
NSN 6105-01-101-6318
NSN 5925-01-475-1832
NSN 5999-00-576-8257
NSN 6320-01-215-1133
NSN 6110-00-797-7559