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 5960-01-567-1096
NSN 6645-01-297-2081
NSN 5960-01-125-2356
NSN 6320-01-139-0533
NSN 5905-01-299-3048
NSN 5965-01-657-9805
NSN 6110-01-043-8291
NSN 5920-01-449-1475
NSN 5998-00-840-6834
NSN 6620-00-155-2608
NSN 6135-01-441-5746
NSN 5985-00-067-9120