The Sprocket Wheel, cataloged under National Stock Number 3020-01-386-3387, 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 Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems. Government technical data includes 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-386-3387 |
| Primary Part Number | DAA7278D254-001 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| Status | ACTIVE |
| Securing Method | THREADED HOLE(S) |
| Bore Length | 0.750 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Outside Diameter | 4.440 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 12 |
| Nominal Thread Size | 0.250 INCHES IN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Center of Bore to Bottom of Keyway | 0.624 INCHES NOMINAL IN |
| Securing Hole Quantity | 1 |
| Thread Size | 1/4-20 |
| Keyway Width | 0.251 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE |
| Hole Location | TRANSVERSELY BETWEEN TEETH INTO BORE KEYWAY |
| Bore Diameter | 1.001 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Furnished Items | KEYING FACILITY |
| Face Width | 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 |
|---|---|
| DAA7278D254-001 PRIMARY | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| Reference | Meaning |
|---|---|
| DAA7278D254 | D/9 Drawing number reference only Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
NSN 3020-01-386-3387 is a Sprocket Wheel, manufactured by Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-386-3387 has 1 manufacturer part number on file: DAA7278D254-001 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems).
Key specifications for DAA7278D254-001: Securing Method: THREADED HOLE(S); Bore Length: 0.750 INCHES NOMINAL IN; Design Form: PLAIN; Outside Diameter: 4.440 INCHES NOMINAL IN. 22 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.