The Sprocket Wheel, cataloged under National Stock Number 3020-00-474-9684, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-474-9684 |
| Primary Part Number | B226246 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Hub Outside Diameter | 1.750 INCHES NOMINAL BB END IN |
| Hub Outside Diameter | 2.188 INCHES NOMINAL AA END IN |
| Bore Length | 1.000 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Tooth Pitch | 0.375 INCHES NOMINAL IN |
| Asa Standard Chain Number | 35 |
| Outside Diameter | 5.059 INCHES MINIMUM AND 5.064 INCHES MAXIMUM IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 5.018 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 42 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Hub End to Flange End | 0.219 INCHES NOMINAL BOTH ENDS IN |
| Distance From Hub End to Flange End | 0.156 INCHES NOMINAL BB END IN |
| Keyway Width | 0.1885 INCHES MINIMUM AND 0.1905 INCHES MAXIMUM IN |
| Bore Diameter | 1.2505 INCHES MINIMUM AND 1.2510 INCHES MAXIMUM IN |
| Material | IRON MALLEABLE |
| Furnished Items | KEYING FACILITY AND LIGHTENING HOLE |
| Face Width | 0.625 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 |
|---|---|
| B226246 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 1442844 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 1442844 | 3/9 Design control — primary reference General Motors Corp |
NSN 3020-00-474-9684 is a Sprocket Wheel, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-474-9684 has 1 manufacturer part number on file: B226246 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for B226246: Hub Outside Diameter: 1.750 INCHES NOMINAL BB END IN; Hub Outside Diameter: 2.188 INCHES NOMINAL AA END IN; Bore Length: 1.000 INCHES NOMINAL IN; Design Form: WEBBED. 23 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.