The Sprocket Wheel, cataloged under National Stock Number 3020-01-138-6749, 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 Sea Cure Technology, Inc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-138-6749 |
| Primary Part Number | 026239-4 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Sea Cure Technology, Inc |
| Status | ACTIVE |
| Hub Outside Diameter | 3.500 INCHES NOMINAL AA END IN |
| Bore Length | 1.062 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 0.500 INCHES NOMINAL IN |
| Asa Standard Chain Number | 41 |
| Outside Diameter | 7.450 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 7.168 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 45 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Hub End to Flange End | 0.562 INCHES NOMINAL AA END IN |
| Bore Diameter | 0.750 INCHES NOMINAL IN |
| Material | STEEL |
| Face Width | 0.500 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 |
|---|---|
| 026239-4 PRIMARY | Sea Cure Technology, Inc (USA) |
| 41B45 | Altra Industrial Motion Corp. (USA) |
| Reference | Meaning |
|---|---|
| SKSU45-1 | C/1 Advisory reference — outside the item-of-supply concept Altra Industrial Motion Corp. |
| 41B45 | C/1 Advisory reference — outside the item-of-supply concept Martin Sprocket and Gear Inc |
| 41B45-3/4 | C/1 Advisory reference — outside the item-of-supply concept Altra Industrial Motion Corp. |
| 026239-4 | 5/9 Secondary reference Uniflite Inc |
NSN 3020-01-138-6749 is a Sprocket Wheel, manufactured by Sea Cure Technology, Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-138-6749 has 2 manufacturer part numbers on file: 026239-4 (Sea Cure Technology, Inc), 41B45 (Altra Industrial Motion Corp.).
Key specifications for 026239-4: Hub Outside Diameter: 3.500 INCHES NOMINAL AA END IN; Bore Length: 1.062 INCHES NOMINAL IN; Design Form: PLAIN; Tooth Pitch: 0.500 INCHES NOMINAL IN. 17 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.