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 5925-01-401-5314
NSN 6685-01-265-0634
NSN 7035-01-455-3482
NSN 5950-01-352-0960
NSN 4140-00-246-4969
NSN 6650-01-487-9454
NSN 6110-01-589-5005
NSN 5855-01-573-2483
NSN 6610-01-197-8302
NSN 5835-00-034-4976
NSN 6220-01-540-5924
NSN 5895-01-328-1614