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 6645-01-031-6402
NSN 5950-00-802-3607
NSN 6105-00-790-7056
NSN 5960-01-241-0105
NSN 6320-01-476-7702
NSN 5920-01-218-5415
NSN 7035-01-204-7298
NSN 6620-01-388-5713
NSN 5985-01-401-5387
NSN 5930-00-772-9815
NSN 5985-01-113-3953
NSN 6320-00-593-0379