The Sprocket Wheel, cataloged under National Stock Number 3020-01-041-0612, 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 Oshkosh Defense Llc. Government technical data includes 22 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-041-0612 |
| Primary Part Number | 1SR20 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Hub Outside Diameter | 3.375 INCHES NOMINAL AA END IN |
| Securing Method | DRILLED HOLE |
| Bore Length | 0.324 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 0.375 INCHES NOMINAL IN |
| Asa Standard Chain Number | 35 |
| Outside Diameter | 4.390 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 4.183 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 35 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Hub End to Flange End | 0.156 INCHES NOMINAL AA END IN |
| Securing Hole Quantity | 4 |
| Bolt Circle Diameter | 3.250 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.206 INCHES NOMINAL IN |
| Hole Location | THRU SPROCKET FACE 90 DEGS APART |
| Bore Diameter | 2.508 INCHES NOMINAL IN |
| Material | STEEL |
| Face Width | 0.168 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 |
|---|---|
| 1SR20 PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| RMI-130 | 5/9 Secondary reference Santa Rosa Mfg Co Inc |
| RM1-130 | 5/9 Secondary reference Santa Rosa Mfg Co Inc |
| 1SR20 | 5/9 Secondary reference Oshkosh Corp |
NSN 3020-01-041-0612 is a Sprocket Wheel, manufactured by Oshkosh Defense Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-041-0612 has 1 manufacturer part number on file: 1SR20 (Oshkosh Defense Llc).
Key specifications for 1SR20: Hub Outside Diameter: 3.375 INCHES NOMINAL AA END IN; Securing Method: DRILLED HOLE; Bore Length: 0.324 INCHES NOMINAL IN; Design Form: PLAIN. 22 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.