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 6610-01-310-0553
NSN 6135-00-432-8779
NSN 6685-00-432-3576
NSN 6145-00-943-5482
NSN 6105-00-086-9256
NSN 5925-00-816-2673
NSN 6320-00-513-8376
NSN 5950-00-350-7766
NSN 5996-00-240-3224
NSN 6130-00-176-1664
NSN 6240-00-146-6703
NSN 6610-00-176-5486