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 5895-01-312-4399
NSN 6150-01-079-8642
NSN 6220-00-643-4045
NSN 4140-01-024-9414
NSN 6145-00-539-9799
NSN 5855-00-058-1293
NSN 6685-01-343-0640
NSN 5950-01-547-8019
NSN 6620-01-643-6817
NSN 7035-01-311-7660
NSN 5915-01-360-5247
NSN 5950-01-400-2859