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 5960-01-530-0581
NSN 5935-01-129-9130
NSN 6610-01-123-7292
NSN 5996-01-615-8389
NSN 5930-01-496-2565
NSN 6240-00-244-0483
NSN 5935-01-128-4592
NSN 2925-01-538-1343
NSN 6610-01-111-6418
NSN 6220-00-959-5970
NSN 6145-01-549-6136
NSN 4140-00-938-3307