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 6650-01-381-2972
NSN 5835-00-905-7165
NSN 6240-01-401-5340
NSN 5990-00-181-2220
NSN 5855-01-273-3843
NSN 6130-01-029-8786
NSN 5855-00-361-0167
NSN 6645-01-462-3754
NSN 6145-01-141-6809
NSN 5985-01-225-8353
NSN 5999-01-497-0825
NSN 6620-00-004-1374