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 5965-01-250-3214
NSN 5996-01-143-9609
NSN 6620-01-076-8706
NSN 5935-01-368-0004
NSN 6645-01-054-3969
NSN 5910-00-923-3796
NSN 6135-00-062-5080
NSN 5950-00-783-8287
NSN 5999-00-439-0874
NSN 5975-00-070-5481
NSN 6685-01-467-8429
NSN 6240-00-724-6867