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 6610-01-235-5566
NSN 6620-01-256-4307
NSN 5960-00-088-6527
NSN 6320-01-473-9024
NSN 7035-00-763-6180
NSN 6650-00-654-6950
NSN 6130-01-035-9263
NSN 5935-00-082-7325
NSN 6135-00-377-9165
NSN 6150-01-376-4211
NSN 6610-01-293-9838
NSN 6150-01-411-7427