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 6685-01-539-8575
NSN 4140-00-365-2531
NSN 7035-01-254-3606
NSN 6645-00-183-8812
NSN 5996-01-493-7962
NSN 6130-00-260-0904
NSN 5960-01-278-9394
NSN 5990-00-554-0366
NSN 6220-00-812-0515
NSN 5835-01-507-0731
NSN 6105-01-523-2427
NSN 5910-01-187-7477