The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-832-0837, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-832-0837 |
| Primary Part Number | A51P40520-13 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Width Across Flats | 1.250 INCHES NOMINAL IN |
| Bearing Surface Finish | 125.0 MICROINCHES |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-L-81352,INSIGNIA WHITE MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT (UNJ) |
| Hole Configuration Style | CONFIGURATION B |
| Material Document and Classification | QQ-A-225/6,ALLOY 2024,TEMP T851 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.688 INCHES IN |
| Nut Height | 0.438 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.072 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Test Data Document | 81349-MIL-I-6866 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Thread Quantity Per Inch | 12 |
| Hole Type and Quantity | 3 DRILLED |
| 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 |
|---|---|
| A51P40520-13 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51P40520-13 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51P40520-13 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 5310-00-832-0837 is a Nut,plain,hexagon, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-832-0837 has 1 manufacturer part number on file: A51P40520-13 (Northrop Grumman Systems Corporation).
Key specifications for A51P40520-13: Width Across Flats: 1.250 INCHES NOMINAL IN; Bearing Surface Finish: 125.0 MICROINCHES; Surface Treatment Document and Classification: MIL-A-8625,TYPE 2,CLASS 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-L-81352,INSIGNIA WHITE MIL SPEC 2ND TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT (UNJ). 15 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.