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 6645-01-187-6997
NSN 5985-00-199-8997
NSN 6645-00-106-0140
NSN 5945-01-310-8487
NSN 5999-01-484-4286
NSN 5950-01-261-6782
NSN 5996-01-211-8067
NSN 6320-01-089-9086
NSN 5950-01-460-7213
NSN 5920-01-411-4611
NSN 6220-00-877-6376
NSN 6220-00-244-2040