The Sprocket Wheel, cataloged under National Stock Number 3020-01-439-2302, 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 Rexnord Industries, Llc Div Couplings Division. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-01-439-2302 |
| Primary Part Number | 41B8-1/2IN.BORE |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Rexnord Industries, Llc Div Couplings Division |
| Status | ACTIVE |
| Hub Outside Diameter | 0.9840 INCHES NOMINAL BB END IN |
| 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 | 1.5000 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 1.3070 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 8 |
| Hardness Rating Test Method | NOT RATED |
| Distance From Hub End to Flange End | 0.6480 INCHES NOMINAL BB END IN |
| Bore Diameter | 0.5000 INCHES NOMINAL IN |
| Material | STEEL |
| Face Width | 0.2270 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 |
|---|---|
| 41B8-1/2IN.BORE PRIMARY | Rexnord Industries, Llc Div Couplings Division (USA) |
| 41B8-15762 | Altra Industrial Motion Corp. (USA) |
| 41B8-1/2IN.BORE PRIMARY | Emerson Electric Co Browning Mfg Div (USA) |
| ASME B29.1 41B8-1/2IN.BORE | The American Society of Mechanical Engineers (USA) |
| 41B8-1/2IN.BORE | Altra Industrial Motion Corp. (USA) |
| Reference | Meaning |
|---|---|
| ANSI B29.1 41B8-1/2IN.BORE | 5/2 Secondary reference U.S. Government activity |
| 41B8-1/2IN.BORE | 5/9 Secondary reference Emerson Power Transmission Corporation Div Ept |
NSN 3020-01-439-2302 is a Sprocket Wheel, manufactured by Rexnord Industries, Llc Div Couplings Division, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-439-2302 has 5 manufacturer part numbers on file: 41B8-1/2IN.BORE (Rexnord Industries, Llc Div Couplings Division), 41B8-15762 (Altra Industrial Motion Corp.), 41B8-1/2IN.BORE (Emerson Electric Co Browning Mfg Div), ASME B29.1 41B8-1/2IN.BORE (The American Society of Mechanical Engineers), 41B8-1/2IN.BORE (Altra Industrial Motion Corp.).
Key specifications for 41B8-1/2IN.BORE: Hub Outside Diameter: 0.9840 INCHES NOMINAL BB END IN; Bore Length: 0.8750 INCHES NOMINAL IN; Design Form: PLAIN; Tooth Pitch: 0.5000 INCHES NOMINAL IN. 16 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.