The Coupling,shaft,rigid, cataloged under National Stock Number 3010-00-253-6537, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is L3 Technologies, Inc. Div Communication Systems-East. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3010-00-253-6537 |
| Primary Part Number | K866658SUB4PT1 |
| Item Name | Coupling,shaft,rigid |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | L3 Technologies, Inc. Div Communication Systems-East |
| Status | ACTIVE |
| Bore Length | 1.0000 INCHES MINIMUM FIRST END IN |
| Overall Diameter | 0.500 INCHES NOMINAL IN |
| Style Designator | PLAIN SLEEVE |
| Bore Shape | STRAIGHT BOTH ENDS |
| Body Material | STEEL CORROSION RESISTING |
| Threaded Hole Quantity | 2 |
| Thread Size Designator | 8-32 |
| Surface Treatment | PASSIVATE |
| Bore Diameter | 0.2500 INCHES MINIMUM AND 0.2530 INCHES MAXIMUM BOTH ENDS 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 |
|---|---|
| K866658SUB4PT1 PRIMARY | L3 Technologies, Inc. Div Communication Systems-East (USA) |
| Reference | Meaning |
|---|---|
| K866658SUB4PT1 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
NSN 3010-00-253-6537 is a Coupling,shaft,rigid, manufactured by L3 Technologies, Inc. Div Communication Systems-East, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-00-253-6537 has 1 manufacturer part number on file: K866658SUB4PT1 (L3 Technologies, Inc. Div Communication Systems-East).
Key specifications for K866658SUB4PT1: Bore Length: 1.0000 INCHES MINIMUM FIRST END IN; Overall Diameter: 0.500 INCHES NOMINAL IN; Style Designator: PLAIN SLEEVE; Overall Length: 1.000 INCHES NOMINAL IN. 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.