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 5960-01-137-2329
NSN 5930-00-223-5224
NSN 5998-00-548-1936
NSN 5945-01-498-6410
NSN 6130-01-529-9483
NSN 2925-00-845-1480
NSN 6620-01-544-8735
NSN 5910-00-269-4755
NSN 5935-01-495-0074
NSN 6110-00-326-8878
NSN 5905-01-400-0963
NSN 5925-00-456-0651