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 6645-00-318-5613
NSN 5985-00-256-7836
NSN 5905-00-332-5542
NSN 5935-00-992-0345
NSN 6130-00-585-9448
NSN 5975-00-139-5369
NSN 5935-01-449-8780
NSN 5990-00-224-9408
NSN 5950-01-220-6202
NSN 6620-00-236-2048
NSN 5895-00-088-2878
NSN 6145-01-068-4668