The Coupling,shaft,flexible, cataloged under National Stock Number 3010-00-855-2607, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is L3harris Technologies, Inc.. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3010-00-855-2607 |
| Primary Part Number | 61666-1 |
| Item Name | Coupling,shaft,flexible |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | L3harris Technologies, Inc. |
| Status | ACTIVE |
| Securing Method | THREADED HOLE(S) BOTH ENDS |
| Threaded Hole Location | BOTH ENDS: LOCATED ON HUB 0.125 IN. FROM HUB END IN |
| Bore Length | 0.6010 INCHES NOMINAL BOTH ENDS IN |
| Design Type | INSERT |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Bore Shape | STRAIGHT BOTH ENDS |
| Threaded Hole Quantity | 1 BOTH ENDS |
| Thread Size Designator | 4-40 BOTH ENDS |
| Bore Diameter | 0.2498 INCHES NOMINAL BOTH ENDS IN |
| Insert Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3010-00-855-2607 is a Coupling,shaft,flexible, manufactured by L3harris Technologies, Inc., classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-00-855-2607 has 2 manufacturer part numbers on file: G401-4 (Steego Corp), 61666-1 (L3harris Technologies, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-206-4889. Verify interchangeability with system specifications before substitution.
Key specifications for 61666-1: Securing Method: THREADED HOLE(S) BOTH ENDS; Threaded Hole Location: BOTH ENDS: LOCATED ON HUB 0.125 IN. FROM HUB END IN; Bore Length: 0.6010 INCHES NOMINAL BOTH ENDS IN; Design Type: INSERT. 10 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.