The Gearshaft,spur, cataloged under National Stock Number 3040-01-147-8590, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Rolls-Royce Corporation. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-147-8590 |
| Primary Part Number | 23031921 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| 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 |
|---|---|
| 23031921 PRIMARY | Rolls-Royce Corporation (USA) |
| Reference | Meaning |
|---|---|
| 6899239 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| E23031921 | C/1 Advisory reference — outside the item-of-supply concept Extex Engineered Products Inc Dba Timken Aerospace Services |
| 6899239 | 5/9 Secondary reference Rolls-Royce Corporation |
| E23031921 | 5/9 Secondary reference Extex, Ltd. |
NSN 3040-01-147-8590 is a Gearshaft,spur, manufactured by Rolls-Royce Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-147-8590 has 1 manufacturer part number on file: 23031921 (Rolls-Royce Corporation).
Key specifications for 23031921: Special Features: STEEL PER AMS6260;4.120 IN. O/A LG;1.209 IN. O/D;1.0625 IN. PITCH DIA;20 DEG PRESSURE ANGLE;17 TEETH;0.353 IN. MIN 0.363 IN. MAX GEAR FACE DIA;ONE SET EXTERNAL SPLINE LOCATED ON EACH OF TWO PROTRUDING HUBS;0.685 IN. MIN 0.690 IN. MAX DIA HUBS IN. 0 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.