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 5985-01-462-3644
NSN 6135-00-904-6780
NSN 6240-01-181-4474
NSN 7035-01-040-6373
NSN 5910-01-095-0502
NSN 5999-01-445-6846
NSN 5925-00-423-2791
NSN 6150-00-499-5729
NSN 6150-01-152-1356
NSN 5998-01-341-4673
NSN 6645-01-318-1874
NSN 6105-00-060-3280