The Shaft Assembly,flexible, cataloged under National Stock Number 3040-00-528-0286, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 29 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-528-0286 |
| Item Name | Shaft Assembly,flexible |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Spline Type | INVOLUTE BOTH ENDS |
| Cross Section Size and Location | 0.406 INCHES NOMINAL DIAMETER BOTH ENDS IN |
| End Overall Diameter | 0.750 INCHES NOMINAL BOTH ENDS IN |
| End Connection Type | THREADED INTERNAL BOTH ENDS |
| Spline Length | 0.2505 INCHES NOMINAL BOTH ENDS IN |
| Thread Depth | 0.313 INCHES NOMINAL BOTH ENDS IN |
| Pitch Diameter | 0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM BOTH ENDS IN |
| Spline Major Diameter | 0.299 INCHES MINIMUM AND 0.303 INCHES MAXIMUM BOTH ENDS IN |
| Thread Location | INTERNAL BOTH ENDS |
| Core Diameter | 0.150 INCHES NOMINAL IN |
| Torsional Deflection Rating | 7 DEG FT-LB IN. IN WINDING AND UNWINDING DIRECTION |
| Thread Direction | RIGHT-HAND BOTH ENDS |
| Spline Pressure Angle in Deg | 14.5 BOTH ENDS |
| Spline Quantity | 12 BOTH ENDS |
| Casing Length Between Ferrules | 44.000 INCHES NOMINAL IN |
| Core Rotation Direction | CLOCKWISE OR COUNTERCLOCKWISE |
| Core Removability | REMOVABLE |
| Core Overall Length | 45.000 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNS BOTH ENDS |
| Surface Treatment | ZINC CASING |
| Protective Coating Method | COATED CASING |
| Wrenching Facility Outside Diameter | 0.750 INCHES NOMINAL BOTH ENDS IN |
| Wrenching Facility Type | KNURLED SURFACE BOTH ENDS |
| Material | STEEL CORE |
| Material | STEEL CASING |
| Casing Outside Diameter | 0.335 INCHES NOMINAL IN |
| End Type | ROUND, INTERNAL SPLINED BOTH ENDS |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY CASING LENGTH BETWEEN FERRULES AND CORE OVERALL LENGTH AND OVERALL LENGTH |
| Tip Length | 0.500 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 |
|---|---|
| SCD2035 | 3/1 Design control — primary reference U.S. Government activity |
NSN 3040-00-528-0286 is a Shaft Assembly,flexible, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-00-529-0672. Verify interchangeability with system specifications before substitution.
Key specifications for 3040-00-528-0286: Spline Type: INVOLUTE BOTH ENDS; Cross Section Size and Location: 0.406 INCHES NOMINAL DIAMETER BOTH ENDS IN; End Overall Diameter: 0.750 INCHES NOMINAL BOTH ENDS IN; End Connection Type: THREADED INTERNAL BOTH ENDS. 29 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.