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 5935-01-250-3121
NSN 5996-01-215-5713
NSN 5950-01-399-8677
NSN 5925-01-366-3568
NSN 6145-01-479-5578
NSN 5920-00-754-5252
NSN 5950-00-235-3786
NSN 5960-01-278-9394
NSN 6135-01-366-9633
NSN 5920-00-199-9498
NSN 6320-00-572-5753
NSN 5895-00-004-1849