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 6610-01-528-5750
NSN 5855-01-087-1417
NSN 6610-01-534-5747
NSN 5975-01-210-2276
NSN 5990-00-436-9008
NSN 5950-01-100-7895
NSN 5990-01-176-9731
NSN 6135-00-087-5300
NSN 5965-01-416-8138
NSN 5960-00-432-8989
NSN 5855-00-586-6255
NSN 5996-01-340-8813