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 5920-00-170-4247
NSN 6610-01-521-0582
NSN 6610-01-152-2821
NSN 6685-01-037-5186
NSN 6240-00-006-3725
NSN 6130-00-053-2992
NSN 5960-00-194-1488
NSN 5996-00-946-9975
NSN 5895-00-879-9193
NSN 6240-01-225-8518
NSN 5975-01-305-9076
NSN 5996-00-752-6007