MIL-N-25027/1A, MILITARY SPECIFICATION: NUT, SELF-LOCKING, HEAVY HEX, (NON-METALLIC INSERT) 250 DEGREES AND 450 DEGREES F, UNJC-3B, 1/4 THROUGH 2-1/2 INCH NOMINAL DIAMETERS, NICKEL-COPPER ALLOY (28 APR 1995) [S/S BY MIL-DTL-32258]

MIL-N-25027/1A, MILITARY SPECIFICATION: NUT, SELF-LOCKING, HEAVY HEX, (NON-METALLIC INSERT) 250 DEGREES AND 450 DEGREES F, UNJC-3B, 1/4 THROUGH 2-1/2 INCH NOMINAL DIAMETERS, NICKEL-COPPER ALLOY (28 APR 1995) [S/S BY MIL-DTL-32258]., This specification covers the requirements for nickel-copper alloy, self-locking nuts.