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 5985-01-222-0039
NSN 5910-01-365-4872
NSN 6105-01-108-1243
NSN 5895-01-279-1998
NSN 5950-00-350-8373
NSN 5905-00-244-5714
NSN 6650-00-197-7563
NSN 5950-00-243-2011
NSN 5999-00-717-7498
NSN 5990-01-516-9665
NSN 6220-01-435-6297
NSN 4140-01-362-9957