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 5950-01-086-7930
NSN 5910-01-312-3931
NSN 2925-01-350-8372
NSN 5975-00-687-2196
NSN 5975-01-138-4306
NSN 5930-01-074-3390
NSN 6240-01-371-8637
NSN 5945-01-139-3293
NSN 5965-01-123-3770
NSN 5985-01-242-7295
NSN 5905-00-723-2006
NSN 5920-01-504-3216