The Sprocket Wheel, cataloged under National Stock Number 3020-01-026-4021, 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 | 3020-01-026-4021 |
| Primary Part Number | 3021137-1 |
| 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 |
| Hub Outside Diameter | 2.750 INCHES NOMINAL AA END IN |
| Securing Method | KEY |
| Bore Length | 1.250 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Teeth Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM |
| Tooth Pitch | 0.750 INCHES NOMINAL IN |
| Asa Standard Chain Number | 60 |
| Outside Diameter | 3.979 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Metallic Hardness Rating and Location | 25.0 ROCKWELL C MINIMUM BODY AND 30.0 ROCKWELL C MAXIMUM BODY |
| Material Document and Classification | SAE 4140 ASSN STD SINGLE MATERIAL RESPONSE |
| Pitch Diameter | 3.607 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 15 |
| Protruding Hub Characteristic | GROOVED |
| Hardness Rating Test Method | ROCKWELL |
| Distance From Center of Bore to Bottom of Keyway | 1.111 INCHES MAXIMUM IN |
| Keyway Width | 0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE |
| First End Groove Diameter | 2.125 INCHES NOMINAL AA END IN |
| Bore Diameter | 1.750 INCHES MINIMUM IN |
| Material | STEEL COMP 4140 |
| Furnished Items | KEYING FACILITY |
| Face Width | 0.459 INCHES NOMINAL IN |
| First End Groove Width | 0.290 INCHES NOMINAL AA END IN |
| Securing Location | BOTH ENDS |
| 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 |
|---|---|
| 3021137-1 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-01-026-4021 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 3020-01-026-4021 has 1 manufacturer part number on file: 3021137-1 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 3021137-1: Hub Outside Diameter: 2.750 INCHES NOMINAL AA END IN; Securing Method: KEY; Bore Length: 1.250 INCHES NOMINAL IN; Design Form: PLAIN. 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.
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.