The Gear,spur, cataloged under National Stock Number 3020-00-679-9889, 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 General Dynamics Mission Systems, Inc. Dba Gdms. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-679-9889 |
| Primary Part Number | 344B4608 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | General Dynamics Mission Systems, Inc. Dba Gdms |
| Status | ACTIVE |
| Nominal Distance From End to Second Groove | 0.278 INCHES FIRST END IN |
| Bore Nominal Diameter | 0.312 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.406 INCHES FIRST END IN |
| Teeth Quantity | 100 |
| Clamping Surface Nominal Length | 0.195 INCHES FIRST END IN |
| Body Style | PLAIN, WITH LIGHTENING HOLES |
| Bore Style | PLAIN BOTH ENDS |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 3.1250 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Second Groove Nominal Width | 0.020 INCHES FIRST END IN |
| Hub Style Designator | 2 GROOVES FIRST END |
| Nominal Outside Diameter | 3.187 INCHES IN |
| Nominal Distance From End to First Groove | 0.050 INCHES FIRST END IN |
| Second Groove Nominal Diameter | 0.436 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| First Groove Nominal Diameter | 0.382 INCHES FIRST END IN |
| First Groove Nominal Width | 0.033 INCHES FIRST END IN |
| Face Nominal Width | 0.050 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 |
|---|---|
| 344B4608 | General Dynamics Mission Systems, Inc. Dba Gdms (USA) |
| Reference | Meaning |
|---|---|
| SMB248952 | 3/2 Design control — primary reference U.S. Government activity |
| 344B4608 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-00-679-9889 is a Gear,spur, manufactured by General Dynamics Mission Systems, Inc. Dba Gdms, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-679-9889 has 1 manufacturer part number on file: 344B4608 (General Dynamics Mission Systems, Inc. Dba Gdms).
Key specifications for 344B4608: Nominal Distance From End to Second Groove: 0.278 INCHES FIRST END IN; Bore Nominal Diameter: 0.312 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.406 INCHES FIRST END IN; Teeth Quantity: 100. 20 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.