The Sprocket Wheel, cataloged under National Stock Number 3020-01-439-2313, 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 25 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-439-2313 |
| Primary Part Number | 41B12-1/2IN.BORE KW1/8X1/16 |
| 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 | 1.5940 INCHES NOMINAL BB END IN |
| Securing Method | SETSCREW |
| Bore Length | 0.8750 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 0.5000 INCHES NOMINAL IN |
| Asa Standard Chain Number | 41-1 |
| Outside Diameter | 2.1700 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Pitch Diameter | 1.9320 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 12 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Center of Bore to Bottom of Keyway | 0.3120 INCHES NOMINAL IN |
| Distance From Hub End to Flange End | 0.6480 INCHES NOMINAL BB END IN |
| Keyway Width | 0.1250 INCHES NOMINAL IN |
| Bore Diameter | 0.5000 INCHES NOMINAL IN |
| Material | STEEL |
| Furnished Items | KEYING FACILITY |
| Face Width | 0.2270 INCHES NOMINAL IN |
| Furnished Items and Quantity | 1 SETSCREW |
| 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 |
|---|---|
| 41B12 1/2-15522 | Altra Industrial Motion Corp. (USA) |
| 41B12-1/2IN.BORE KW1/8X1/16 PRIMARY | Emerson Electric Co Browning Mfg Div (USA) |
| 41B12-1/2IN.BORE KW1/8X1/16 PRIMARY | Rexnord Industries, Llc Div Couplings Division (USA) |
| B29.1 41B12-1/2"BORE KW1/8X1/16 | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| 41B12 1/2IN.BORE KW1/8X1/16 | 5/9 Secondary reference Altra Industrial Motion Corp. |
| 41B12-1/2IN.BORE KW1/8X1/16 | 5/9 Secondary reference Emerson Power Transmission Corporation Div Ept |
| B29.1 41B12-1/2"BORE KW1/8X1/16 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-439-2313 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 3020-01-439-2313 has 4 manufacturer part numbers on file: 41B12 1/2-15522 (Altra Industrial Motion Corp.), 41B12-1/2IN.BORE KW1/8X1/16 (Emerson Electric Co Browning Mfg Div), 41B12-1/2IN.BORE KW1/8X1/16 (Rexnord Industries, Llc Div Couplings Division), B29.1 41B12-1/2"BORE KW1/8X1/16 (The American Society of Mechanical Engineers).
Key specifications for 41B12-1/2IN.BORE KW1/8X1/16: Hub Outside Diameter: 1.5940 INCHES NOMINAL BB END IN; Securing Method: SETSCREW; Bore Length: 0.8750 INCHES NOMINAL IN; Design Form: PLAIN. 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.
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.