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 5975-01-299-6679
NSN 2925-00-570-3037
NSN 5920-01-108-9400
NSN 5998-01-044-2035
NSN 5945-01-324-3749
NSN 5930-01-513-6725
NSN 5925-01-423-7429
NSN 5996-00-461-8645
NSN 6105-00-771-0893
NSN 5950-01-547-9915
NSN 5965-01-323-8134
NSN 6220-00-983-1415