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 5998-00-201-6757
NSN 5975-01-437-1473
NSN 5895-01-654-9108
NSN 5905-01-406-3177
NSN 6105-01-103-7628
NSN 6645-01-069-8746
NSN 5990-01-446-5546
NSN 6110-00-402-0055
NSN 5975-01-608-0108
NSN 5925-01-158-0762
NSN 5920-00-071-9241
NSN 6610-01-499-0776