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 6320-00-731-6134
NSN 6145-01-329-5935
NSN 6150-00-073-9162
NSN 6135-01-238-2878
NSN 6620-01-014-7192
NSN 7035-00-470-4977
NSN 5910-01-442-3287
NSN 6685-01-614-0186
NSN 6320-00-937-5625
NSN 6220-00-516-9270
NSN 5855-01-611-2803
NSN 6645-01-121-6952