The Sprocket Wheel, cataloged under National Stock Number 3020-01-178-9950, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-178-9950 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Hub Outside Diameter | 3.000 INCHES NOMINAL AA END IN |
| Bore Length | 3.000 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 0.627 INCHES NOMINAL IN |
| Asa Standard Chain Number | 50 |
| Outside Diameter | 4.120 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 3.798 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 19 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Hub End to Flange End | 0.657 INCHES NOMINAL AA END IN |
| Bore Diameter | 0.625 INCHES NOMINAL IN |
| Material | STEEL |
| Face Width | 0.343 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 |
| Reference | Meaning |
|---|---|
| 50B19 | 3/9 Design control — primary reference Martin Sprocket and Gear Inc |
NSN 3020-01-178-9950 is a Sprocket Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-01-178-9950: Hub Outside Diameter: 3.000 INCHES NOMINAL AA END IN; Bore Length: 3.000 INCHES NOMINAL IN; Design Form: PLAIN; Tooth Pitch: 0.627 INCHES NOMINAL IN. 17 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.