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 5895-01-360-5634
NSN 5985-00-135-4058
NSN 4140-01-276-8307
NSN 6130-01-135-5810
NSN 5945-01-248-3456
NSN 5835-00-690-8898
NSN 6610-01-451-5503
NSN 5895-01-352-4994
NSN 5925-01-113-8272
NSN 6220-01-564-3469
NSN 6620-00-054-4778
NSN 5915-00-952-2320