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 6150-01-181-7279
NSN 6240-00-168-1474
NSN 5996-01-207-0804
NSN 6320-01-611-4918
NSN 5910-00-707-4900
NSN 5910-00-216-4726
NSN 5855-01-583-6497
NSN 5965-01-292-0035
NSN 6320-01-046-5228
NSN 6145-00-427-7201
NSN 4140-01-538-7252
NSN 6320-00-377-5683