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 5935-01-491-9756
NSN 2925-01-250-2731
NSN 5920-01-136-6802
NSN 5915-01-332-7433
NSN 5998-01-315-1519
NSN 6135-00-087-5300
NSN 5905-01-315-2691
NSN 5985-01-384-4950
NSN 6110-01-051-0951
NSN 5905-01-648-6667
NSN 5950-01-508-4244
NSN 5855-01-425-6340