The Coupling Half,shaft, cataloged under National Stock Number 3010-00-618-6542, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. Government technical data includes 4 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 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3010-00-618-6542 |
| Primary Part Number | 540-2173-002 |
| Item Name | Coupling Half,shaft |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| Status | ACTIVE |
| Bore Length | 0.2770 INCHES NOMINAL IN |
| Body Style | FLEXIBLE KEY INSERT TYPE, COUNTERBORED BORE |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 540-2173-002 PRIMARY | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| 127028 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
NSN 3010-00-618-6542 is a Coupling Half,shaft, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-00-618-6542 has 2 manufacturer part numbers on file: 540-2173-002 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems), 127028 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
2 possible matches (shared part number, not a government interchangeability claim): 6515-01-387-4244, 6680-01-394-0857. Verify interchangeability with system specifications before substitution.
Key specifications for 540-2173-002: Bore Length: 0.2770 INCHES NOMINAL IN; Body Style: FLEXIBLE KEY INSERT TYPE, COUNTERBORED BORE; Overall Length: 0.417 INCHES NOMINAL IN; Outside Diameter: 0.875 INCHES NOMINAL IN. 4 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.
NSN 3010-00-618-6542 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.