The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-707-9109, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-707-9109 |
| Primary Part Number | 4M373-4LZ |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Width Across Flats | 3.089 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS2700 OR AMSQQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNJS |
| Material Document and Classification | AMS5659 CONDITION H1025 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.875 INCHES IN |
| Nut Diameter | 4.300 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Thickness | 0.565 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-12 OVERALL |
| 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 |
|---|---|
| 4M373-4LZ PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| SLN7534-3 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-707-9109 is a Nut,self-Locking,round, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-707-9109 has 1 manufacturer part number on file: 4M373-4LZ (The Boeing Company Div Defense).
Key specifications for 4M373-4LZ: Width Across Flats: 3.089 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS2700 OR AMSQQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNJS; Material Document and Classification: AMS5659 CONDITION H1025 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 14 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.