The Collar,shaft, cataloged under National Stock Number 3040-00-078-4558, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Us Army Aviation and Missile Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-00-078-4558 |
| Primary Part Number | 9978826 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Style Designator | PLAIN ROUND |
| Outside Diameter | 0.625 INCHES NOMINAL IN |
| Nominal Thread Size | 0.190 INCHES SINGLE HOLE IN |
| Angle Between Centerlines of Securing Holes in Deg | 90.0 |
| Securing Hole Quantity | 2 |
| Surface Treatment | ZINC |
| Bore Diameter | 0.2810 INCHES NOMINAL IN |
| Material | COPPER ALLOY OR STEEL |
| Thickness | 0.280 INCHES MINIMUM AND 0.285 INCHES MAXIMUM 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 |
|---|---|
| 9978826 | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| 8200-12 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-078-4558 is a Collar,shaft, manufactured by Us Army Aviation and Missile Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-078-4558 has 1 manufacturer part number on file: 9978826 (Us Army Aviation and Missile Command).
2 possible matches (shared part number, not a government interchangeability claim): 5330-00-492-2014, 4310-01-544-1361. Verify interchangeability with system specifications before substitution.
Key specifications for 9978826: Style Designator: PLAIN ROUND; Outside Diameter: 0.625 INCHES NOMINAL IN; Nominal Thread Size: 0.190 INCHES SINGLE HOLE IN; Angle Between Centerlines of Securing Holes in Deg: 90.0. 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.