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 5999-01-190-1399
NSN 5855-00-318-7185
NSN 6150-00-806-4302
NSN 5985-01-359-2108
NSN 6320-01-562-1599
NSN 6145-01-510-9570
NSN 5999-01-529-5029
NSN 6685-01-385-0222
NSN 5930-01-139-4418
NSN 5985-01-083-1812
NSN 5996-01-044-1376
NSN 6320-01-392-3531