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 2925-00-491-3549
NSN 6610-01-122-0064
NSN 4140-01-200-8651
NSN 6130-00-213-9204
NSN 5996-00-084-8940
NSN 5996-01-440-9660
NSN 5905-01-201-0418
NSN 6240-01-311-1121
NSN 6320-00-977-3930
NSN 6610-01-645-4688
NSN 5996-01-250-2814
NSN 5925-00-241-1441