The Gear,spur, cataloged under National Stock Number 3020-01-043-8319, 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 Timken Gears & Services Inc. Div Philadelphia Gear. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-043-8319 |
| Primary Part Number | A-685658 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Timken Gears & Services Inc. Div Philadelphia Gear |
| Status | ACTIVE |
| Keyway Nominal Width | 0.188 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.875 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.625 INCHES BOTH ENDS IN |
| Teeth Quantity | 48 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.375 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 1.000 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.0000 INCHES NOMINAL IN |
| Tooth Form | SPECIAL |
| Hub Style Designator | PLAIN SECOND END |
| Hub Style Designator | PINNED FIRST END |
| Nominal Outside Diameter | 3.094 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.625 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 1040 OVERALL |
| Face Nominal Width | 0.500 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 |
|---|---|
| A-685658 PRIMARY | Timken Gears & Services Inc. Div Philadelphia Gear (USA) |
| Reference | Meaning |
|---|---|
| 01-055-0050-4PC7 | D/9 Drawing number reference only Timken Gears & Services Inc. Div Philadelphia Gear |
NSN 3020-01-043-8319 is a Gear,spur, manufactured by Timken Gears & Services Inc. Div Philadelphia Gear, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-043-8319 has 1 manufacturer part number on file: A-685658 (Timken Gears & Services Inc. Div Philadelphia Gear).
Key specifications for A-685658: Keyway Nominal Width: 0.188 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.875 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.625 INCHES BOTH ENDS IN; Teeth Quantity: 48. 19 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.