The Sprocket Wheel, cataloged under National Stock Number 3020-00-256-6530, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 29 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-256-6530 |
| Primary Part Number | 2531016 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Spline Minor Diameter | 0.417 INCHES NOMINAL IN |
| Hub Outside Diameter | 1.182 INCHES NOMINAL AA END IN |
| Hub Outside Diameter | 1.182 INCHES NOMINAL BOTH ENDS IN |
| First Step Diameter | 1.406 INCHES NOMINAL AA END IN |
| Design Form | PLAIN |
| Teeth Hardness Rating | 50.5 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM |
| Tooth Pitch | 0.625 INCHES NOMINAL IN |
| Asa Standard Chain Number | 50-1 |
| Outside Diameter | 4.321 INCHES NOMINAL IN |
| Spline Length | 0.594 INCHES NOMINAL IN |
| Second Step Length | 0.250 INCHES NOMINAL AA END IN |
| Style Designator | PLAIN |
| Metallic Hardness Rating and Location | 200.0 BRINELL STANDARD MINIMUM BODY AND 240.0 BRINELL STANDARD MAXIMUM BODY |
| Pitch Diameter | 3.995 INCHES NOMINAL IN |
| Spline Major Diameter | 0.500 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Bore Type | INVOLUTE SPLINE |
| Counterbore Depth | 1.437 INCHES NOMINAL AND 0.344 INCHES NOMINAL IN |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 20 |
| Counterbore Location | BOTH ENDS |
| Spline Pressure Angle in Deg | 30.0 |
| Protruding Hub Characteristic | STEPPED |
| Hardness Rating Test Method | BRINELL |
| Spline Quantity | 11 |
| Counterbore Diameter | 0.750 INCHES NOMINAL IN |
| Distance From Hub End to Flange End | 0.938 INCHES NOMINAL BOTH ENDS IN |
| First Step Length | 0.688 INCHES NOMINAL AA END IN |
| Material | STEEL |
| Furnished Items | COUNTERBORE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2531016 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-00-256-6530 is a Sprocket Wheel, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-256-6530 has 1 manufacturer part number on file: 2531016 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 2531016: Spline Minor Diameter: 0.417 INCHES NOMINAL IN; Hub Outside Diameter: 1.182 INCHES NOMINAL AA END IN; Hub Outside Diameter: 1.182 INCHES NOMINAL BOTH ENDS IN; First Step Diameter: 1.406 INCHES NOMINAL AA END IN. 29 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.
NSN 3020-00-256-6530 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.