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 5935-01-396-4573
NSN 5998-00-162-8142
NSN 6240-01-054-2289
NSN 6150-01-339-7054
NSN 6135-01-563-4445
NSN 5855-00-014-5008
NSN 2925-01-534-7314
NSN 6645-00-877-6002
NSN 5999-01-604-9872
NSN 6320-00-004-9158
NSN 5975-01-587-7036
NSN 6320-01-558-8844