The Sprocket Wheel, cataloged under National Stock Number 3020-00-151-7588, 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 General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 21 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 | 3020-00-151-7588 |
| Primary Part Number | 139C6897 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Hub Outside Diameter | 1.125 INCHES NOMINAL AA END IN |
| Securing Method | DRILLED HOLE |
| Bore Length | 0.670 INCHES NOMINAL0.670 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Outside Diameter | 3.000 INCHES NOMINAL3.000 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Metallic Hardness Rating and Location | 33.0 ROCKWELL C MINIMUM BODY AND 38.0 ROCKWELL C MAXIMUM BODY |
| Material Document and Classification | MIL-S-18729, COMP 4130, COND N MIL SPEC 1ST MATERIAL RESPONSE AND MIL-S-6758 MIL SPEC 2ND MATERIAL RESPONSE |
| Bore Type | STRAIGHT |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 5 |
| Protruding Hub Characteristic | PLAIN |
| Hardness Rating Test Method | ROCKWELL |
| Distance From Hub End to Flange End | 0.530 INCHES NOMINAL AA END IN |
| Securing Hole Quantity | 11 |
| Drilled Hole Diameter | 0.189 INCHES NOMINAL0.189 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE |
| Hole Location | ON HUB |
| Bore Diameter | 0.688 INCHES NOMINAL0.688 INCHES NOMINAL IN |
| Material | STEEL COMP 4130 |
| Face Width | 0.135 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 |
|---|---|
| 139C6897 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
NSN 3020-00-151-7588 is a Sprocket Wheel, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-151-7588 has 1 manufacturer part number on file: 139C6897 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 139C6897: Hub Outside Diameter: 1.125 INCHES NOMINAL AA END IN; Securing Method: DRILLED HOLE; Bore Length: 0.670 INCHES NOMINAL0.670 INCHES NOMINAL IN; Design Form: PLAIN. 21 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.