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 6650-00-665-3658
NSN 6105-01-283-1655
NSN 6130-01-521-2555
NSN 5996-00-114-4071
NSN 6320-01-190-1397
NSN 5996-00-270-0340
NSN 6130-00-470-5195
NSN 5895-01-278-5297
NSN 6685-00-168-0912
NSN 5905-01-612-0080
NSN 6220-01-480-4585
NSN 5975-00-111-6781