AS9120B, ISO 9001:2015, and FAA AC 0056B Accredited
| Item Name | Nut Self Locking Hexagon |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-878-5931 (008785931) |
| NCB Code | USA (00) |
| Manufacturer | Martin Baker Aircraft Co Ltd, British Standards Institution |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3B |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| ADEA | NUT HEIGHT | 0.340 INCHES NOMINAL |
| ASDB | WIDTH ACROSS FLATS | 0.431 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
| AZKQ | TEMP RATING | -75.0 DEG CELSIUS MINIMUM AND 200.0 DEG CELSIUS MAXIMUM |
| BZRR | THREAD SERIES | UNF |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| CQJX | NOMINAL THREAD SIZE | 0.250 INCHES |
| CRSQ | COUNTERSINK ANGLE | 90.0 DEGREES MINIMUM NUT AND 120.0 DEGREES MAXIMUM NUT |
| CRTM | BEARING SURFACE TYPE | FLAT OR CHAMFERED |
| MATT | MATERIAL | STEEL NUT |
| SFTT | SURFACE TREATMENT | CADMIUM NUT |
| AAUM | LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| ACTA | NUT STYLE | HEXAGON |
| MATT | MATERIAL | FIBER LOCKING INSERT |
| Relevant Components for NSN - 5310-00-878-5931, 5310008785931 | ||||
| 5320-01-311-2514 (5320013112514) | 5365-01-606-7886 (5365016067886) | 5310-01-687-5946 (5310016875946) | 5331-01-345-2325 (5331013452325) | |
| 5331-01-137-6352 (5331011376352) | 5340-01-677-5187 (5340016775187) | 5310-01-215-1121 (5310012151121) | 5330-01-558-9303 (5330015589303) | |
| 5320-01-007-1870 (5320010071870) | 5365-00-542-0989 (5365005420989) | 5305-01-279-0723 (5305012790723) | 5315-01-181-8363 (5315011818363) | |
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