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 5855-01-433-2220
NSN 5895-00-185-4543
NSN 5920-01-108-9400
NSN 2925-01-538-1343
NSN 6105-01-173-9178
NSN 5960-01-495-0859
NSN 5905-01-531-5522
NSN 5835-01-329-4814
NSN 5965-01-399-8454
NSN 5950-01-107-7845
NSN 5835-00-253-3453
NSN 6135-00-998-5884