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 4140-00-968-0685
NSN 6320-00-405-2348
NSN 6645-01-076-4655
NSN 6110-01-394-8723
NSN 5950-01-363-8512
NSN 5950-00-203-1291
NSN 5985-01-445-4736
NSN 6240-01-463-8276
NSN 5905-01-142-2894
NSN 5835-01-495-0595
NSN 5935-00-057-8255
NSN 6320-00-261-9136