The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-356-6159, 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 Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-356-6159 |
| Primary Part Number | 03A120-4A7 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Plate Thickness | 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN |
| Nut Length | 1.272 INCHES MINIMUM AND 1.292 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SHELL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.534 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN |
| Mounting Hole Arrangement Style | 2 HOLES |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE FIRST END |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Nut Counterbore Depth | 0.437 INCHES MINIMUM AND 0.457 INCHES MAXIMUM FIRST END IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Counterbore Diameter | 0.254 INCHES MAXIMUM AND 0.274 INCHES MAXIMUM FIRST END IN |
| Distance From Aperture Center to Mounting Hole Center | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN |
| Nut Height | 0.637 INCHES MINIMUM AND 0.657 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE SHELL |
| Nut Style | PLATE (FLOATING) |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 OVERALL |
| Nut Mounting Provision | STRAIGHT HOLES |
| 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 |
|---|---|
| F52891-4-7 | Howmet Global Fastening Systems Inc (USA) |
| 03A120-4A7 | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA) |
| BFN120-4-7 | Bristol Industries, Llc (USA) |
| 03A120-4A7 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 03A120-4A7 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| Reference | Meaning |
|---|---|
| NS202749-4-7 | 5/2 Secondary reference U.S. Government activity |
| F13742-7-4 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-356-6159 is a Nut,self-Locking,plate, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-356-6159 has 5 manufacturer part numbers on file: F52891-4-7 (Howmet Global Fastening Systems Inc), 03A120-4A7 (Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems), BFN120-4-7 (Bristol Industries, Llc), 03A120-4A7 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 03A120-4A7 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems).
Key specifications for 03A120-4A7: Lubrication: DRY FILM LUBRICANT; Plate Thickness: 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN; Nut Length: 1.272 INCHES MINIMUM AND 1.292 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SHELL. 23 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.