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 5950-01-191-0113
NSN 6220-00-057-8451
NSN 6145-01-599-3202
NSN 5910-01-582-5034
NSN 5998-01-216-5172
NSN 2925-00-172-9264
NSN 6650-01-620-4706
NSN 6320-01-150-5378
NSN 6145-00-985-8348
NSN 6150-00-954-5722
NSN 6135-01-355-8917
NSN 6105-01-645-1033