The Shaft Assembly,flexible, cataloged under National Stock Number 3040-00-039-9668, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 19 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 | 3040-00-039-9668 |
| Primary Part Number | 8337939 |
| Item Name | Shaft Assembly,flexible |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Spline Type | INVOLUTE BOTH ENDS |
| Pitch Diameter | 0.250 INCHES NOMINAL BOTH ENDS IN |
| Thread Location | INTERNAL BOTH ENDS |
| Core Diameter | 0.313 INCHES NOMINAL IN |
| Features Provided | SWIVEL END BOTH ENDS |
| Thread Direction | RIGHT-HAND BOTH ENDS |
| Spline Pressure Angle in Deg | 14.5 BOTH ENDS |
| Spline Quantity | 12 BOTH ENDS |
| Core Rotation Direction | CLOCKWISE OR COUNTERCLOCKWISE |
| Core Removability | REMOVABLE |
| Core Overall Length | 78.750 INCHES MINIMUM AND 79.250 INCHES MAXIMUM IN |
| Screw Thread Series Designator | UNEF BOTH ENDS |
| Surface Treatment | ZINC CASING |
| Thread Class | 3B BOTH ENDS |
| Material | STEEL CORE |
| Material | STEEL CASING |
| Casing Outside Diameter | 0.625 INCHES NOMINAL IN |
| Minimum Operating Radius | 4.500 INCHES IN |
| End Type | ROUND, EXTERNAL SPLINED BOTH ENDS |
| 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 |
|---|---|
| 8337939 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 3040-00-039-9668 is a Shaft Assembly,flexible, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-039-9668 has 1 manufacturer part number on file: 8337939 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8337939: Spline Type: INVOLUTE BOTH ENDS; Pitch Diameter: 0.250 INCHES NOMINAL BOTH ENDS IN; Overall Length: 81.000 INCHES MINIMUM AND 81.500 INCHES MAXIMUM IN; Thread Location: INTERNAL BOTH ENDS. 19 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.