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 6650-00-410-8705
NSN 5895-00-971-2288
NSN 6130-00-255-5566
NSN 6610-01-333-2381
NSN 5855-01-225-5855
NSN 6110-01-511-9917
NSN 5950-00-177-3055
NSN 6685-00-735-4689
NSN 5990-01-116-2181
NSN 6685-00-357-1102
NSN 5935-01-562-2543
NSN 6135-00-935-8769