The Coupling,shaft,flexible, cataloged under National Stock Number 3010-01-281-4512, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Lo-Rez Vibration Control Ltd. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3010-01-281-4512 |
| Primary Part Number | FC-270HF-80 |
| Item Name | Coupling,shaft,flexible |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Lo-Rez Vibration Control Ltd |
| Status | ACTIVE |
| Keyway Depth | 0.7600 INCHES NOMINAL FIRST END IN |
| Securing Method | UNTHREADED HOLE(S) SECOND END |
| Bore Length | 8.2500 INCHES NOMINAL FIRST END IN |
| Design Type | INSULATOR W/SPRING ACTION |
| Keying Facility Type | KEYWAY FIRST END |
| Outside Diameter | 35.998 INCHES MINIMUM AND 36.002 INCHES MAXIMUM IN |
| Features Provided | KEYWAY AND EXPOSED COUPLING BOLT TYPE |
| Bore Shape | STRAIGHT FIRST END |
| Keying Facility Quantity | 1 FIRST END |
| Unthreaded Hole Quantity | 16 SECOND END |
| Keyway Width | 1.501 INCHES NOMINAL FIRST END IN |
| Unthreaded Hole Location | SECOND END: AXIALLY AROUND FLANGE |
| Bore Diameter | 6.4965 INCHES NOMINAL FIRST END IN |
| Hole Diameter | 0.781 INCHES NOMINAL SECOND END IN |
| 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 |
|---|---|
| FC-270HF-80 PRIMARY | Lo-Rez Vibration Control Ltd (CAN) |
| H/HF-231/4.80SP PRIMARY | Lo-Rez Vibration Control Ltd (CAN) |
| Reference | Meaning |
|---|---|
| HH7231-4.80SP | C/1 Advisory reference — outside the item-of-supply concept Lo-Rez Vibration Control Ltd |
NSN 3010-01-281-4512 is a Coupling,shaft,flexible, manufactured by Lo-Rez Vibration Control Ltd, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-01-281-4512 has 2 manufacturer part numbers on file: FC-270HF-80 (Lo-Rez Vibration Control Ltd), H/HF-231/4.80SP (Lo-Rez Vibration Control Ltd).
Key specifications for FC-270HF-80: Keyway Depth: 0.7600 INCHES NOMINAL FIRST END IN; Securing Method: UNTHREADED HOLE(S) SECOND END; Bore Length: 8.2500 INCHES NOMINAL FIRST END IN; Design Type: INSULATOR W/SPRING ACTION. 14 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.