The Collar,shaft, cataloged under National Stock Number 3040-01-304-8291, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-304-8291 |
| Primary Part Number | 65850-03021-106 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Style Designator | PLAIN ROUND |
| Material Document and Classification | QQ-A-250/11, ALLOY 6061, T651 FED SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 3.812 INCHES NOMINAL IN |
| Bore Diameter | 3.3750 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 |
| Thickness | 0.750 INCHES NOMINAL 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 |
|---|---|
| 65850-03021-106 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| 65850-03021 | D/9 Drawing number reference only Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 3040-01-304-8291 is a Collar,shaft, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-304-8291 has 1 manufacturer part number on file: 65850-03021-106 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
1 possible match (shared part number, not a government interchangeability claim): 1095-01-305-8738. Verify interchangeability with system specifications before substitution.
Key specifications for 65850-03021-106: Style Designator: PLAIN ROUND; Material Document and Classification: QQ-A-250/11, ALLOY 6061, T651 FED SPEC SINGLE MATERIAL RESPONSE; Outside Diameter: 3.812 INCHES NOMINAL IN; Special Features: CUT 0.010 IN. MINIMUM TO 0.120 IN. MAXIMUM WIDTH IN. 6 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.