The Sprocket Wheel, cataloged under National Stock Number 3020-01-438-0118, 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 Emerson Electric Co Browning Mfg Div. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-438-0118 |
| Primary Part Number | 80B25 2-1/2IN.BORE |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Emerson Electric Co Browning Mfg Div |
| Status | ACTIVE |
| Hub Outside Diameter | 4.2500 INCHES NOMINAL BB END IN |
| Securing Method | SETSCREW |
| Bore Length | 1.6250 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 1.0000 INCHES NOMINAL IN |
| Asa Standard Chain Number | 80-1 |
| Outside Diameter | 8.5200 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Pitch Diameter | 7.9790 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 25 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Center of Bore to Bottom of Keyway | 1.5620 INCHES NOMINAL IN |
| Distance From Hub End to Flange End | 1.0470 INCHES NOMINAL BB END IN |
| Keyway Width | 0.6250 INCHES NOMINAL IN |
| Bore Diameter | 2.5000 INCHES NOMINAL IN |
| Material | STEEL |
| Furnished Items | KEYING FACILITY |
| Face Width | 0.5750 INCHES NOMINAL IN |
| Securing Location | BB END |
| 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 |
|---|---|
| 5D3-02278 IT NO 11 | Lake Shore Systems, Inc. (USA) |
| 80B25 2-1/2IN.BORE PRIMARY | Emerson Electric Co Browning Mfg Div (USA) |
| 5D3-02404 IT NO 11 | Lake Shore Systems, Inc. (USA) |
| 5C9-03063 PRIMARY | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 80B25 | 5/1 Secondary reference Emerson Electric Co Browning Mfg Div |
| 5D3-02278 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
| 5D3-02404 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
NSN 3020-01-438-0118 is a Sprocket Wheel, manufactured by Emerson Electric Co Browning Mfg Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-438-0118 has 4 manufacturer part numbers on file: 5D3-02278 IT NO 11 (Lake Shore Systems, Inc.), 80B25 2-1/2IN.BORE (Emerson Electric Co Browning Mfg Div), 5D3-02404 IT NO 11 (Lake Shore Systems, Inc.), 5C9-03063 (Lake Shore Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2020-01-506-6852. Verify interchangeability with system specifications before substitution.
Key specifications for 80B25 2-1/2IN.BORE: Hub Outside Diameter: 4.2500 INCHES NOMINAL BB END IN; Securing Method: SETSCREW; Bore Length: 1.6250 INCHES NOMINAL IN; Design Form: PLAIN. 24 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.