The Gear,spur, cataloged under National Stock Number 3020-00-640-4532, 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 Smart Machines, Inc. Dba Barker and Williamson. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3020-00-640-4532 |
| Primary Part Number | B13612 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Smart Machines, Inc. Dba Barker and Williamson |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.313 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.625 INCHES FIRST END IN |
| Teeth Quantity | 144 |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES FIRST END IN |
| Nominal Overall Length | 0.375 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 3.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 3.042 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Face Nominal Width | 0.125 INCHES 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 |
|---|---|
| B13612 PRIMARY | Smart Machines, Inc. Dba Barker and Williamson (USA) |
| Reference | Meaning |
|---|---|
| SMB184961 | 3/2 Design control — primary reference U.S. Government activity |
| B13612 | 5/9 Secondary reference Barker & Williamson |
NSN 3020-00-640-4532 is a Gear,spur, manufactured by Smart Machines, Inc. Dba Barker and Williamson, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-640-4532 has 1 manufacturer part number on file: B13612 (Smart Machines, Inc. Dba Barker and Williamson).
Key specifications for B13612: Bore Nominal Diameter: 0.313 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.625 INCHES FIRST END IN; Teeth Quantity: 144; Nominal Distance Between Body Face and Protruding Hub End: 0.250 INCHES FIRST END IN. 12 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.