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 6320-01-616-0843
NSN 6135-00-798-1425
NSN 6105-01-502-9759
NSN 4140-01-085-4965
NSN 6150-01-112-9371
NSN 6610-01-197-9639
NSN 5990-00-236-8152
NSN 5998-00-229-6795
NSN 5985-00-443-9175
NSN 5915-01-281-3636
NSN 5996-00-267-1139
NSN 6110-01-656-4495