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 5910-00-100-1496
NSN 5835-00-373-2671
NSN 5960-01-342-9965
NSN 6610-01-128-2428
NSN 5965-00-978-8535
NSN 6145-01-047-1149
NSN 4140-01-361-8883
NSN 6320-01-227-2648
NSN 6610-00-305-5447
NSN 5835-01-023-6774
NSN 6220-00-202-8591
NSN 5910-01-539-3912