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 6105-01-024-9425
NSN 6240-01-535-8066
NSN 2925-01-527-5335
NSN 5920-01-122-4181
NSN 5925-01-320-0934
NSN 6130-00-034-0536
NSN 7035-01-326-9980
NSN 5855-01-500-2531
NSN 6610-00-170-6715
NSN 7035-01-265-0216
NSN 5965-00-263-6436
NSN 5925-00-900-1904