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 6650-00-555-1061
NSN 5835-00-665-3395
NSN 4140-01-279-7609
NSN 6610-01-398-8815
NSN 2925-01-197-7864
NSN 6650-00-542-9042
NSN 5945-01-481-3701
NSN 5925-01-075-4598
NSN 5950-01-424-0948
NSN 6130-00-485-7941
NSN 5855-00-911-1370
NSN 5965-01-468-6186