The Gear,spur, cataloged under National Stock Number 3020-01-077-7305, 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 Caterpillar Inc Div Caterpillar Defense. Government technical data includes 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-077-7305 |
| Primary Part Number | 9N1691 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Bore Nominal Diameter | 3.875 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 4.8437 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.5937 INCHES SECOND END IN |
| Teeth Quantity | 48 |
| Body Style | WEBBED, OFFSET, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Style Designator | ONE FLUSH HUB, ONE RECESSED HUB |
| Pitch Diameter | 8.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Features Provided | CASEHARDENED |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 60 BOTH ENDS |
| Nominal Outside Diameter | 8.3333 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Spline Pitch Diameter | 3.7500 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 1.875 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 |
|---|---|
| 9N1691 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 3020-01-077-7305 is a Gear,spur, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-077-7305 has 1 manufacturer part number on file: 9N1691 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 9N1691: Bore Nominal Diameter: 3.875 INCHES BOTH ENDS IN; Hub Nominal Diameter: 4.8437 INCHES SECOND END IN; Nominal Distance Between Body Face and Recessed Hub End: 0.5937 INCHES SECOND END IN; Teeth Quantity: 48. 17 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.