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 6240-01-260-9082
NSN 6620-01-316-3487
NSN 5960-00-581-5821
NSN 5998-01-079-1920
NSN 5965-00-714-3588
NSN 5950-00-113-9268
NSN 5855-01-281-9700
NSN 6110-01-189-5036
NSN 6105-01-486-3600
NSN 5930-00-135-5046
NSN 5910-00-600-0777
NSN 5930-01-513-8047