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 6220-01-527-5231
NSN 5915-00-615-0358
NSN 5920-01-211-5557
NSN 6645-01-391-9477
NSN 6610-01-334-8883
NSN 5935-00-681-7996
NSN 5835-01-180-1400
NSN 5895-01-294-6315
NSN 5855-00-943-3894
NSN 5990-01-501-5409
NSN 5905-01-493-9414
NSN 6130-01-464-4856