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 6145-01-232-2658
NSN 6135-00-318-8359
NSN 5965-00-455-7581
NSN 6320-01-173-7950
NSN 5950-01-506-6158
NSN 5975-00-450-8975
NSN 5905-01-516-8932
NSN 6135-00-087-5300
NSN 5999-00-131-7973
NSN 6610-00-376-3308
NSN 6685-01-299-9842
NSN 6685-00-720-3525