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 6620-01-542-8709
NSN 5950-01-519-2709
NSN 5835-00-477-3162
NSN 6145-01-577-0338
NSN 5835-01-378-6804
NSN 6610-01-414-1755
NSN 5930-01-314-4080
NSN 5925-01-227-4048
NSN 5895-01-346-0677
NSN 5985-00-951-6902
NSN 5975-01-167-9081
NSN 6130-00-451-8665