The Sprocket Wheel, cataloged under National Stock Number 3020-01-398-9961, 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 Northrop Grumman Systems Corporation. Government technical data includes 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-01-398-9961 |
| Primary Part Number | F525-11172-6 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Hub Outside Diameter | 1.250 INCHES NOMINAL AA END IN |
| Securing Method | DRILLED HOLE |
| Bore Length | 0.875 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Tooth Pitch | 0.500 INCHES NOMINAL IN |
| Asa Standard Chain Number | 40-1 |
| Outside Diameter | 1.839 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 1.618 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 10 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | NOT RATED |
| Distance From Hub End to Flange End | 0.591 INCHES NOMINAL AA END IN |
| Securing Hole Quantity | 1 |
| Drilled Hole Diameter | 0.250 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN |
| Hole Location | 0.250 IN. FROM END OF HUB IN |
| Bore Diameter | 0.750 INCHES NOMINAL IN |
| Material | STEEL |
| Face Width | 0.284 INCHES NOMINAL IN |
| Securing Location | AA 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 |
|---|---|
| F525-11172-6 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| F525-11172 | D/9 Drawing number reference only U.S. Government activity |
| F525-11172-6 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-398-9961 is a Sprocket Wheel, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-398-9961 has 1 manufacturer part number on file: F525-11172-6 (Northrop Grumman Systems Corporation).
Key specifications for F525-11172-6: Hub Outside Diameter: 1.250 INCHES NOMINAL AA END IN; Securing Method: DRILLED HOLE; Bore Length: 0.875 INCHES NOMINAL IN; Design Form: PLAIN. 22 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.