Reference manual no. 37013-250
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 5925-01-059-0275
NSN 6320-00-731-6134
NSN 4140-00-442-3490
NSN 5960-00-106-7247
NSN 5996-01-543-3543
NSN 5935-01-254-6193
NSN 2925-00-933-0200
NSN 5975-00-233-6301
NSN 5999-00-150-4771
NSN 5905-00-960-2889
NSN 5910-01-057-4987
NSN 5965-01-241-0553