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 6610-01-579-9646
NSN 5950-00-540-9283
NSN 6220-00-460-0615
NSN 6240-00-761-6643
NSN 7035-01-532-8077
NSN 5965-01-371-1297
NSN 6145-00-216-6613
NSN 6645-01-480-3347
NSN 5835-00-155-1379
NSN 5855-01-523-7715
NSN 5855-01-060-8521
NSN 5925-01-442-1223