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 5960-00-431-8739
NSN 5965-01-312-1630
NSN 5835-00-683-4612
NSN 5935-01-259-9270
NSN 5920-00-161-2813
NSN 6320-01-366-5157
NSN 6610-01-203-6608
NSN 5925-01-305-3088
NSN 6135-00-904-6780
NSN 5975-00-269-4365
NSN 5950-00-757-2687
NSN 6685-01-553-4325