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 5835-01-399-5820
NSN 6130-00-809-5267
NSN 5985-01-172-3164
NSN 5895-01-122-8811
NSN 5945-01-485-3447
NSN 4140-00-561-7991
NSN 6610-01-627-0642
NSN 6105-00-156-9084
NSN 6110-01-268-3348
NSN 5985-01-042-9663
NSN 6240-00-539-9770
NSN 6135-01-364-0667