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 5935-01-519-9349
NSN 5998-01-215-0019
NSN 6110-01-345-6626
NSN 6135-01-148-8531
NSN 6240-01-110-8265
NSN 5960-01-493-3948
NSN 6645-00-801-8237
NSN 6320-00-583-3105
NSN 5950-00-741-2811
NSN 5945-01-367-6090
NSN 5905-00-552-5640
NSN 5996-00-589-0552