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 6220-01-422-2585
NSN 6610-01-327-3187
NSN 5960-01-632-6576
NSN 6145-01-412-0926
NSN 2925-00-115-5857
NSN 4140-00-931-9638
NSN 6220-01-042-4613
NSN 6110-00-104-6396
NSN 5999-00-139-1729
NSN 6135-00-299-6918
NSN 6240-01-235-2604
NSN 6105-01-391-7124