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 5990-00-518-0684
NSN 5950-01-317-5648
NSN 5999-00-756-8508
NSN 5920-01-348-5986
NSN 5996-00-279-5806
NSN 2925-01-089-6269
NSN 7035-00-529-3128
NSN 5950-01-427-3723
NSN 6145-01-470-8192
NSN 5855-01-175-3990
NSN 5855-00-494-9581
NSN 5999-01-351-8790