The Shaft Assembly,flexible, cataloged under National Stock Number 3040-01-566-6738, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Schulze Mfg., Inc.. Government technical data includes 9 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. 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 | 3040-01-566-6738 |
| Primary Part Number | 6658-6 |
| Item Name | Shaft Assembly,flexible |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Schulze Mfg., Inc. |
| Status | ACTIVE |
| Coating Method | PLATED CASING |
| Thread Length | 0.625 INCHES NOMINAL BOTH ENDS IN |
| Thread Direction | RIGHT-HAND BOTH ENDS |
| Screw Thread Series Designator | UNF BOTH ENDS |
| Surface Treatment | ZINC CASING |
| Thread Class | 2A BOTH ENDS A |
| Material | STEEL CORE |
| Material | PLASTIC VINYL CASING |
| Cloth-Fabric Name | VINYL CASING |
| 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 |
|---|---|
| 6658-6 PRIMARY | Schulze Mfg., Inc. (USA) |
NSN 3040-01-566-6738 is a Shaft Assembly,flexible, manufactured by Schulze Mfg., Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-566-6738 has 1 manufacturer part number on file: 6658-6 (Schulze Mfg., Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-649-4764. Verify interchangeability with system specifications before substitution.
Key specifications for 6658-6: Coating Method: PLATED CASING; Thread Length: 0.625 INCHES NOMINAL BOTH ENDS IN; Overall Length: 6.000 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND BOTH ENDS. 9 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.