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 6130-00-266-7496
NSN 5925-00-127-1436
NSN 6320-01-021-6633
NSN 5985-01-261-0739
NSN 5950-01-267-0917
NSN 5965-00-042-5433
NSN 5985-01-355-7360
NSN 5960-00-477-5331
NSN 5925-00-881-0537
NSN 6145-00-610-6987
NSN 5915-00-150-4694
NSN 6650-01-041-3479