The Shaft Assembly,flexible, cataloged under National Stock Number 1680-00-474-1297, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-00-474-1297 |
| Item Name | Shaft Assembly,flexible |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Status | ACTIVE |
| FSC Application Data | MISCELLANEOUS AIRCRAFT ACCESSORIES AND COMPONENTS |
| Width Across Flats | 0.750 INCHES NOMINAL BOTH ENDS IN |
| Spline Type | INVOLUTE BOTH ENDS |
| Cross Section Size and Location | 0.406 INCHES NOMINAL DIAMETER BOTH ENDS IN |
| End Overall Diameter | 0.875 INCHES NOMINAL BOTH ENDS IN |
| End Connection Type | UNION FERRULE BOTH ENDS |
| Spline Length | 0.244 INCHES NOMINAL BOTH ENDS IN |
| Pitch Diameter | 0.250 INCHES NOMINAL BOTH ENDS IN |
| Spline Major Diameter | 0.307 INCHES NOMINAL BOTH ENDS IN |
| Core Diameter | 0.250 INCHES NOMINAL IN |
| Torsional Deflection Rating | 5 DEG FT-LB IN. TORSIONAL DEFLECTION RATING IN WINDING DIRECTION,7 DEG FT-LB IN. UNWINDING |
| Spline Pressure Angle in Deg | 14.5 BOTH ENDS |
| Spline Quantity | 12 BOTH ENDS |
| Casing Length Between Ferrules | 19.000 INCHES NOMINAL IN |
| Core Rotation Direction | CLOCKWISE OR COUNTERCLOCKWISE |
| Shank Outside Diameter | 0.500 INCHES NOMINAL BOTH ENDS IN |
| Core Removability | NONREMOVABLE |
| Core Overall Length | 21.686 INCHES NOMINAL IN |
| Minor Diameter | UNABLE TO DECODE |
| Wrenching Facility Type | HEXAGON BOTH ENDS |
| Material | STEEL CORE |
| Material | STEEL CASING |
| Casing Outside Diameter | 0.445 INCHES NOMINAL IN |
| Minimum Operating Radius | 10.000 INCHES IN |
| End Type | ROUND, EXTERNAL SPLINED BOTH ENDS |
| Tip Length | 0.531 INCHES NOMINAL BOTH ENDS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 635087-3 | 5/2 Secondary reference U.S. Government activity |
| 31551-020-20 | 3/9 Design control — primary reference Lucas Aerospace Power Equipment Corporation |
NSN 1680-00-474-1297 is a Shaft Assembly,flexible, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
Key specifications for 1680-00-474-1297: FSC Application Data: MISCELLANEOUS AIRCRAFT ACCESSORIES AND COMPONENTS; Width Across Flats: 0.750 INCHES NOMINAL BOTH ENDS IN; Spline Type: INVOLUTE BOTH ENDS; Cross Section Size and Location: 0.406 INCHES NOMINAL DIAMETER BOTH ENDS IN. 26 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.