The Sprocket Wheel, cataloged under National Stock Number 3020-01-421-4632, 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 13 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-421-4632 |
| Primary Part Number | 50B17SS-0.875 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Emerson Electric Co Browning Mfg Div |
| Status | ACTIVE |
| Bore Length | 0.999 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Asa Standard Chain Number | 50SS |
| Outside Diameter | 3.720 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 3.401 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 17 |
| Hardness Rating Test Method | NOT RATED |
| Bore Diameter | 0.875 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 50B17SS-0.875 PRIMARY | Emerson Electric Co Browning Mfg Div (USA) |
| Reference | Meaning |
|---|---|
| 50B17SS-0.875 | C/1 Advisory reference — outside the item-of-supply concept Cullman Wheel Co |
| PL50271000 ITEM 5 | 5/9 Secondary reference Gulf Coast Holdings, Inc Dba Unidynamics |
| 50B17SS-0.875 | 5/9 Secondary reference Martin Sprocket and Gear Inc |
| PL50271000 ITEM 5 | 5/2 Secondary reference U.S. Government activity |
| 50271000 ITEM 5 | 5/9 Secondary reference Gulf Coast Holdings, Inc Dba Unidynamics |
| 50271000 ITEM 5 | 5/2 Secondary reference U.S. Government activity |
| PL50271000 ITEM 5 | 5/9 Secondary reference U.S. Government activity |
| 50271000 ITEM 5 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-01-421-4632 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 3020-01-421-4632 has 1 manufacturer part number on file: 50B17SS-0.875 (Emerson Electric Co Browning Mfg Div).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-592-0685. Verify interchangeability with system specifications before substitution.
Key specifications for 50B17SS-0.875: Bore Length: 0.999 INCHES NOMINAL IN; Design Form: PLAIN; Asa Standard Chain Number: 50SS; Outside Diameter: 3.720 INCHES NOMINAL IN. 13 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.