The Coupling Half,shaft, cataloged under National Stock Number 3010-01-503-7868, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Martin Sprocket and Gear Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3010-01-503-7868 |
| Primary Part Number | 5016-1.375IN BORE |
| Item Name | Coupling Half,shaft |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Martin Sprocket and Gear Inc |
| Status | ACTIVE |
| Bore Length | 1.4400 INCHES NOMINAL IN |
| Body Style | TOOTHED |
| Material Document and Classification | QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 3.340 INCHES NOMINAL IN |
| Features Provided | KEYWAY |
| Bore Shape | STRAIGHT |
| Bore Diameter | 0.7500 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 | X |
| Part Number | Manufacturer |
|---|---|
| 906943 REV A | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA) |
| 5016-1.375IN BORE PRIMARY | Martin Sprocket and Gear Inc (USA) |
| Reference | Meaning |
|---|---|
| 906943 | D/9 Drawing number reference only Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer |
NSN 3010-01-503-7868 is a Coupling Half,shaft, manufactured by Martin Sprocket and Gear Inc, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-01-503-7868 has 2 manufacturer part numbers on file: 906943 REV A (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer), 5016-1.375IN BORE (Martin Sprocket and Gear Inc).
1 possible match (shared part number, not a government interchangeability claim): 4520-01-696-6662. Verify interchangeability with system specifications before substitution.
Key specifications for 5016-1.375IN BORE: Bore Length: 1.4400 INCHES NOMINAL IN; Body Style: TOOTHED; Material Document and Classification: QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 1.440 INCHES NOMINAL IN. 8 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.