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 5910-00-058-0354
NSN 4140-01-633-0377
NSN 7035-01-386-9551
NSN 5965-00-497-8820
NSN 5950-00-205-8342
NSN 6650-01-467-8818
NSN 5999-00-172-5792
NSN 6610-01-560-9461
NSN 6220-01-243-8661
NSN 5915-00-645-3453
NSN 6110-01-399-1176
NSN 5835-01-102-4451