| Item Name | Nut Self Locking Hexagon |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| NIIN | 00-526-1280 (005261280) |
| NCB Code | USA (00) |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3B |
| ABAJ | LUBRICATION | DRY FILM LUBRICANT |
| ACTA | NUT STYLE | HEXAGON |
| AZKQ | TEMP RATING | 450.0 DEG FAHRENHEIT NOMINAL |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| CQFM | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| CRTM | BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| MATT | MATERIAL | STEEL COMP 4140 OVERALL OR STEEL COMP 4340 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP 4130 OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AAUM | LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| ADEA | NUT HEIGHT | 0.221 INCHES MAXIMUM |
| ASDB | WIDTH ACROSS FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| BZRR | THREAD SERIES | UNJF |
| CQJX | NOMINAL THREAD SIZE | 0.250 INCHES |
| CRSQ | COUNTERSINK ANGLE | 120.0 DEGREES NOMINAL NUT |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD 1ST MATERIAL RESPONSE OVERALL OR AMS 6350 ASSN STD 1ST MATERIAL RESPONSE OVERALL OR AMS 6378 ASSN STD 1ST MATERIAL RESPONSE OVERALL OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL OR MIL-S-6049 MIL SPEC 3RD MATERIAL R |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| ZZZK | SPECIFICATION/STANDARD DATA | 81205-BACN10JC MANUFACTURERS STANDARD |
| 5340-01-116-3006 (5340011163006) | 5310-00-596-4908 (5310005964908) | 5315-01-068-8278 (5315010688278) | 5307-01-546-5908 (5307015465908) |
| 5330-00-127-5839 (5330001275839) | 5305-20-000-5243 (5305200005243) | 5310-00-543-4853 (5310005434853) | 5330-01-285-2056 (5330012852056) |
| 5340-01-614-7828 (5340016147828) | 5365-00-173-7596 (5365001737596) | 5330-01-195-1548 (5330011951548) | 5330-01-615-3538 (5330016153538) |
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