The Gear,spur, cataloged under National Stock Number 3020-01-425-3637, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Walker Power Systems, Inc. Dba Tiernay Turbines. Government technical data includes 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-425-3637 |
| Primary Part Number | 107448-1 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Walker Power Systems, Inc. Dba Tiernay Turbines |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.378 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.250 INCHES FIRST END IN |
| Hub Nominal Diameter | 1.630 INCHES SECOND END IN |
| Teeth Quantity | 112 |
| Body Style | PLAIN, SOLID |
| Counterbore Nominal Diameter | 1.653 INCHES COUNTERBORE FIRST END IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.490 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.305 INCHES SECOND END IN |
| Precision Classification | ACCURACY GRADE 10 |
| Hardness Rating | 23.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM BODY |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM BORE SURFACE |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | AMS SAE9310 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.6666 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 4.750 INCHES IN |
| Surface Treatment | CARBON TEETH |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL COMP E9310 OVERALL |
| Counterbore Nominal Depth | 0.490 INCHES COUNTERBORE FIRST END IN |
| Face Nominal Width | 0.345 INCHES IN |
| 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 |
|---|---|
| 107448-1 | General Dynamics Robotic Systems Inc Div General Dynamics Land Systems Inc. (USA) |
| 107448-1 PRIMARY | Walker Power Systems, Inc. Dba Tiernay Turbines (USA) |
| Reference | Meaning |
|---|---|
| 107448 | D/9 Drawing number reference only Walker Power Systems, Inc. Dba Tiernay Turbines |
NSN 3020-01-425-3637 is a Gear,spur, manufactured by Walker Power Systems, Inc. Dba Tiernay Turbines, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-425-3637 has 2 manufacturer part numbers on file: 107448-1 (General Dynamics Robotic Systems Inc Div General Dynamics Land Systems Inc.), 107448-1 (Walker Power Systems, Inc. Dba Tiernay Turbines).
Key specifications for 107448-1: Bore Nominal Diameter: 1.378 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.250 INCHES FIRST END IN; Hub Nominal Diameter: 1.630 INCHES SECOND END IN; Teeth Quantity: 112. 22 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.