The Gear,spur, cataloged under National Stock Number 3020-00-320-2564, 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 Rolls-Royce Marine North America Inc.. Government technical data includes 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-320-2564 |
| Primary Part Number | 6738408 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Rolls-Royce Marine North America Inc. |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.078 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.250 INCHES BOTH ENDS IN |
| Teeth Quantity | 35 |
| Surface Treatment Document and Classification | MIL-C-13924,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | WEBBED, OFFSET, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.119 INCHES BOTH ENDS IN |
| Nominal Overall Length | 0.750 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | AMS 6260 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.5000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 34 BOTH ENDS |
| Nominal Outside Diameter | 3.698 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL COMP E9310 OVERALL |
| Spline Pitch Diameter | 1.0625 INCHES NOMINAL BOTH ENDS IN |
| 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 |
|---|---|
| 6738408 | Precision Gear Industries Llc (USA) |
| 6738408 PRIMARY | Rolls-Royce Marine North America Inc. (USA) |
| Reference | Meaning |
|---|---|
| 6738408 | 5/9 Secondary reference General Motors Corp |
| 6738408 | 5/9 Secondary reference Rolls-Royce Corporation |
| 6738408 | D/9 Drawing number reference only Allison Transmission Inc Dba Allison Transmission, Inc |
NSN 3020-00-320-2564 is a Gear,spur, manufactured by Rolls-Royce Marine North America Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-320-2564 has 2 manufacturer part numbers on file: 6738408 (Precision Gear Industries Llc), 6738408 (Rolls-Royce Marine North America Inc.).
Key specifications for 6738408: Bore Nominal Diameter: 1.078 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.250 INCHES BOTH ENDS IN; Teeth Quantity: 35; Surface Treatment Document and Classification: MIL-C-13924,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.