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 5920-00-068-7801
NSN 6130-01-304-6214
NSN 5835-01-357-9235
NSN 4140-00-869-1435
NSN 5996-01-433-9067
NSN 6105-01-053-8659
NSN 6610-01-224-7247
NSN 6145-00-366-5790
NSN 2925-00-404-6461
NSN 4140-01-004-3035
NSN 5965-00-424-9636
NSN 5975-00-439-7776