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 6135-00-738-5571
NSN 6145-00-184-6171
NSN 6320-01-426-8947
NSN 6610-01-631-4355
NSN 6620-01-607-3362
NSN 5985-00-139-3493
NSN 5960-01-632-6576
NSN 6620-01-283-5627
NSN 5990-01-608-9271
NSN 5996-00-964-9400
NSN 7035-00-623-4744
NSN 5895-00-329-9590