The Coupling Half,shaft, cataloged under National Stock Number 3010-01-280-4349, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Altra Industrial Motion Corp.. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3010-01-280-4349 |
| Primary Part Number | FA5 1/4 |
| Item Name | Coupling Half,shaft |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Altra Industrial Motion Corp. |
| Status | ACTIVE |
| Body Style | MULTI JAW |
| Criticality Code Justification | FEAT |
| Bore Shape | STRAIGHT |
| Bore Diameter | 0.2500 INCHES NOMINAL IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| FA5 1/4 PRIMARY | Altra Industrial Motion Corp. (USA) |
| FA5 ITEM 07904 | Altra Industrial Motion Corp. (USA) |
| Reference | Meaning |
|---|---|
| 425797 | 7/2 Vendor item drawing reference U.S. Government activity |
| 425797-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3010-01-280-4349 is a Coupling Half,shaft, manufactured by Altra Industrial Motion Corp., classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-01-280-4349 has 2 manufacturer part numbers on file: FA5 1/4 (Altra Industrial Motion Corp.), FA5 ITEM 07904 (Altra Industrial Motion Corp.).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-661-1194. Verify interchangeability with system specifications before substitution.
Key specifications for FA5 1/4: Body Style: MULTI JAW; Criticality Code Justification: FEAT; Overall Length: 0.625 INCHES NOMINAL IN; Bore Shape: STRAIGHT. 5 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.