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 6150-00-899-0740
NSN 5920-01-271-6474
NSN 6220-01-498-1369
NSN 5855-01-417-3250
NSN 5905-01-226-0781
NSN 6145-01-435-6458
NSN 6135-01-586-1969
NSN 5999-01-524-7755
NSN 5920-00-155-2173
NSN 6240-01-493-6640
NSN 6610-00-759-1559
NSN 7035-00-402-9426