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 2925-01-243-0328
NSN 5975-00-925-4586
NSN 5945-01-161-8171
NSN 5975-01-448-0893
NSN 5855-01-655-4035
NSN 5985-00-932-1630
NSN 5996-00-806-1566
NSN 5835-01-065-2734
NSN 6645-00-476-7176
NSN 6620-01-226-6569
NSN 5905-01-467-9212
NSN 5910-01-612-7198