The Gear,spur, cataloged under National Stock Number 3020-00-684-1696, 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 Naval Air Warfare Center Aircraft Div. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-684-1696 |
| Primary Part Number | 58A12C39 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Air Warfare Center Aircraft Div |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.187 INCHES BOTH ENDS IN |
| Backlash Designation | GRADE C |
| Teeth Quantity | 105 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.202 INCHES FIRST END IN |
| First Step Nominal Length | 0.183 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 12 |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | ASTM-B-139 TYPE B1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.3125 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 0.468 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Mounting Hole Nominal Thread Size | 0.086 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| End Nominal Length | 0.015 INCHES FIRST END IN |
| Nominal Outside Diameter | 1.337 INCHES IN |
| End Nominal Diameter | 0.281 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| 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 |
|---|---|
| 58A12C39 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 58A12C39 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 58A12C39 PRIMARY | Naval Air Warfare Center Aircraft Div (USA) |
NSN 3020-00-684-1696 is a Gear,spur, manufactured by Naval Air Warfare Center Aircraft Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-684-1696 has 3 manufacturer part numbers on file: 58A12C39 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 58A12C39 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 58A12C39 (Naval Air Warfare Center Aircraft Div).
Key specifications for 58A12C39: Bore Nominal Diameter: 0.187 INCHES BOTH ENDS IN; Backlash Designation: GRADE C; Teeth Quantity: 105; Body Style: PLAIN, SOLID. 24 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.