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 5985-01-431-4251
NSN 6610-01-197-8302
NSN 6110-00-857-4274
NSN 5960-01-244-1969
NSN 5920-01-099-3098
NSN 5905-01-095-8377
NSN 6145-01-566-2470
NSN 5895-01-352-3628
NSN 6320-01-412-2973
NSN 6130-01-080-6577
NSN 5950-01-222-0808
NSN 5990-00-607-0116