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 5996-01-474-0545
NSN 5905-01-445-6642
NSN 6130-00-639-0666
NSN 5835-00-339-3020
NSN 5975-01-025-1613
NSN 5895-01-284-0611
NSN 6610-01-440-0604
NSN 6110-01-446-7482
NSN 6685-00-952-5381
NSN 6110-01-353-4920
NSN 5996-01-633-7979
NSN 5960-00-584-4553