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 6240-01-064-3725
NSN 6620-00-071-3895
NSN 5950-00-159-1571
NSN 6240-00-646-6931
NSN 5960-01-056-4982
NSN 6130-00-053-8382
NSN 5975-00-915-0530
NSN 5999-00-156-4424
NSN 5985-01-164-4014
NSN 6220-01-650-0974
NSN 5910-01-214-0397
NSN 5945-01-217-5615