The Sprocket Wheel, cataloged under National Stock Number 3020-01-426-4993, 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 Altra Industrial Motion Corp.. Government technical data includes 27 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-426-4993 |
| Primary Part Number | 35B30-1/2 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Altra Industrial Motion Corp. |
| Status | ACTIVE |
| Hub Outside Diameter | 2.000 INCHES NOMINAL BB END IN |
| Securing Method | THREADED HOLE(S) |
| Bore Length | 0.875 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 0.375 INCHES NOMINAL IN |
| Asa Standard Chain Number | 35 |
| Outside Diameter | 3.947 INCHES NOMINAL IN |
| Keying Facility Type | KEYWAY |
| Quantity | 1 |
| Style Designator | PLAIN |
| Pitch Diameter | 3.588 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 30 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Center of Bore to Bottom of Keyway | 0.312 INCHES NOMINAL IN |
| Distance From Hub End to Flange End | 0.707 INCHES NOMINAL BB END IN |
| Securing Hole Quantity | 1 |
| Thread Size | 1/4-20 |
| Keyway Width | 0.125 INCHES NOMINAL IN |
| Hole Location | OVER KEYWAY |
| Bore Diameter | 0.500 INCHES NOMINAL IN |
| Material | STEEL |
| Furnished Items | KEYING FACILITY |
| Face Width | 0.168 INCHES NOMINAL IN |
| Securing Location | BB END |
| 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 |
|---|---|
| 1427AS141-2 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 35B30-1/2 PRIMARY | Altra Industrial Motion Corp. (USA) |
| Reference | Meaning |
|---|---|
| 35B30SS-.500 | C/1 Advisory reference — outside the item-of-supply concept Altra Industrial Motion Corp. |
NSN 3020-01-426-4993 is a Sprocket Wheel, manufactured by Altra Industrial Motion Corp., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-426-4993 has 2 manufacturer part numbers on file: 1427AS141-2 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 35B30-1/2 (Altra Industrial Motion Corp.).
Key specifications for 35B30-1/2: Hub Outside Diameter: 2.000 INCHES NOMINAL BB END IN; Securing Method: THREADED HOLE(S); Bore Length: 0.875 INCHES NOMINAL IN; Design Form: PLAIN. 27 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.