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 6130-00-805-1864
NSN 5960-00-789-2830
NSN 5985-01-236-1166
NSN 6620-01-454-2296
NSN 5950-01-145-5529
NSN 5965-00-267-4173
NSN 6610-00-172-7658
NSN 5950-00-034-1361
NSN 4140-00-225-8586
NSN 4140-01-034-9806
NSN 5910-00-119-1612
NSN 5998-00-600-5032