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 6145-01-408-6103
NSN 6320-01-176-8367
NSN 6240-00-816-1041
NSN 6685-00-153-3914
NSN 6130-00-970-5165
NSN 4140-00-226-5872
NSN 5855-01-253-6076
NSN 5990-00-621-0572
NSN 5996-01-336-8340
NSN 6610-00-425-7684
NSN 6620-00-217-7576
NSN 6135-01-647-0386