The Sprocket Wheel, cataloged under National Stock Number 3020-01-034-4788, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Leonardo Spa Helicopters Division - Production Site. Government technical data includes 25 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-034-4788 |
| Primary Part Number | 204-010-768-3 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Leonardo Spa Helicopters Division - Production Site |
| Status | ACTIVE |
| Spline Minor Diameter | 0.8125 INCHES MINIMUM AND 0.8140 INCHES MAXIMUM IN |
| Securing Method | SLOTTED |
| Design Form | PLAIN |
| Tooth Pitch | 0.188 INCHES NOMINAL IN |
| Asa Standard Chain Number | B29.9-1958 |
| Outside Diameter | 1.230 INCHES MINIMUM AND 1.270 INCHES MAXIMUM IN |
| Spline Length | 0.450 INCHES NOMINAL IN |
| Guide Type | GROOVE |
| Style Designator | PLAIN |
| Material Document and Classification | QQ-S-763, CLASS 6, TYPE A FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-763,CLASS 3,TYPE F,410 FED SPEC 2ND MATERIAL RESPONSE |
| Pitch Diameter | 1.248 INCHES MINIMUM AND 1.268 INCHES MAXIMUM IN |
| Spline Major Diameter | 0.9000 INCHES MINIMUM AND 0.9081 INCHES MAXIMUM IN |
| Bore Type | INVOLUTE SPLINE |
| Groove Quantity | 1 |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 21 |
| Spline Pressure Angle in Deg | 30.0 |
| Hardness Rating Test Method | NOT RATED |
| Spline Quantity | 21 |
| Surface Treatment | PASSIVATE |
| Material | STEEL COMP 416 OR STEEL COMP 410 |
| Furnished Items | GUIDE |
| Face Width | 0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN |
| Groove Position | IN CENTER |
| Spline Pitch Diameter | 0.4219 INCHES MINIMUM AND 0.8438 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 204-010-768-3 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| Reference | Meaning |
|---|---|
| 204-010-768-003 | 5/1 Secondary reference U.S. Government activity |
| 204-010-768-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-01-034-4788 is a Sprocket Wheel, manufactured by Leonardo Spa Helicopters Division - Production Site, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-034-4788 has 1 manufacturer part number on file: 204-010-768-3 (Leonardo Spa Helicopters Division - Production Site).
Key specifications for 204-010-768-3: Spline Minor Diameter: 0.8125 INCHES MINIMUM AND 0.8140 INCHES MAXIMUM IN; Securing Method: SLOTTED; Design Form: PLAIN; Tooth Pitch: 0.188 INCHES NOMINAL IN. 25 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 3020-01-034-4788 has DEMIL Code B. 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.