The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-282-7848, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Kalmar Limited. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-282-7848 |
| Primary Part Number | MS21044D8 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Kalmar Limited |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Width Across Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Bearing Surface Finish | 125.0 MICROINCHES |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE NUT |
| Thread Series | UNF |
| Temp Rating | 250.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | QQ-A-200/2,T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/5,T4 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/6,T6 FED SPEC 3RD MATERIAL RESPONSE OR QQ-A-200/11,T6 FED SPEC 4TH MATERIAL RESPONSE NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Counterbore Diameter | 0.511 INCHES MINIMUM AND 0.551 INCHES MAXIMUM NUT IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.575 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE NUT |
| Countersink Angle | 88.0 DEGREES NOMINAL NUT |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2017 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 NUT |
| Bearing Surface Type | CHAMFERED OR WASHER FACED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MS21044D8 | Kalmar Limited (GBR) |
| CV187384 | Tvs Supply Chain Solutions Limited (GBR) |
| Reference | Meaning |
|---|---|
| 68NE-080 | 5/9 Secondary reference Harvard Industries Inc |
| ANN5 | 4/1 Identification reference U.S. Government activity |
| MS21044D8 | 5/9 Secondary reference U.S. Government activity |
| AN365D820A | 5/2 Secondary reference U.S. Government activity |
| MS21044D8 | 3/2 Design control — primary reference U.S. Government activity |
| AN365D820A | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-282-7848 is a Nut,self-Locking,hexagon, manufactured by Kalmar Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-282-7848 has 2 manufacturer part numbers on file: MS21044D8 (Kalmar Limited), CV187384 (Tvs Supply Chain Solutions Limited).
1 possible match (shared part number, not a government interchangeability claim): 5915-01-282-7848. Verify interchangeability with system specifications before substitution.
Key specifications for MS21044D8: Lubrication: SOLUBLE LUBRICANT; Width Across Flats: 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN; Bearing Surface Finish: 125.0 MICROINCHES; Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE NUT. 19 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.