The Gear Cluster, cataloged under National Stock Number 3020-00-690-2941, 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 Dorer Engineering Inc Dba O J Rodgers Company. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-690-2941 |
| Primary Part Number | R875B22 |
| Item Name | Gear Cluster |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Dorer Engineering Inc Dba O J Rodgers Company |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 LUBRICANT IMPREGNATED BEARING |
| Bore Nominal Diameter | 0.125 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.313 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.306 INCHES FIRST END IN |
| Design Type | SPUR SECOND GEAR |
| Design Type | SPUR FIRST GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Overall Length | 0.313 INCHES IN |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Hub Nominal Length | 0.0440 INCHES FIRST END IN |
| Hub Nominal Length | 0.0650 INCHES SECOND END IN |
| Nominal Outside Diameter | 0.438 INCHES SECOND GEAR IN |
| Nominal Outside Diameter | 1.151 INCHES FIRST GEAR IN |
| Material | COPPER ALLOY OVERALL |
| Construction | ASSEMBLED |
| 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 |
|---|---|
| R875B22 PRIMARY | Dorer Engineering Inc Dba O J Rodgers Company (USA) |
| Reference | Meaning |
|---|---|
| 49253-1 | 5/9 Secondary reference Smiths Detection Inc. Dba Smiths Detection Inc Casc |
| R-875-B-22 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 3020-00-690-2941 is a Gear Cluster, manufactured by Dorer Engineering Inc Dba O J Rodgers Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-690-2941 has 1 manufacturer part number on file: R875B22 (Dorer Engineering Inc Dba O J Rodgers Company).
Key specifications for R875B22: Furnished Items and Quantity: 1 LUBRICANT IMPREGNATED BEARING; Bore Nominal Diameter: 0.125 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.313 INCHES SECOND END IN; Hub Nominal Diameter: 0.306 INCHES FIRST END 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.