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 6685-01-148-5834
NSN 6645-00-510-6643
NSN 5835-01-436-6549
NSN 6240-01-454-9196
NSN 5985-01-045-3160
NSN 2925-01-580-8072
NSN 5996-01-547-2045
NSN 5950-01-085-0775
NSN 5930-01-468-6206
NSN 6130-00-608-5502
NSN 5950-00-075-2377
NSN 5935-01-288-8942