The Gear,spur, cataloged under National Stock Number 3020-00-021-3119, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-021-3119 |
| Primary Part Number | 1412542-12 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.240 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.620 INCHES BOTH ENDS IN |
| Teeth Quantity | 90 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 2 THREADED AXIALLY THROUGH FLANGE |
| Nominal Distance Between Body Face and Protruding Hub End | 0.090 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-A-225/B,TEMPER T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.8750 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Mounting Hole Nominal Thread Size | 0.112 INCHES AXIALLY THROUGH FLANGE IN |
| Nominal Outside Diameter | 1.917 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY OVERALL |
| Mounting Hole Thread Series Designator | UNF AXIALLY THROUGH FLANGE |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.095 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 |
|---|---|
| 59-821-12 | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| 1412542-12 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 1412542 | D/9 Drawing number reference only Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 3020-00-021-3119 is a Gear,spur, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-021-3119 has 2 manufacturer part numbers on file: 59-821-12 (Lockheed Martin Corporation Div Rms - Mitchel Field), 1412542-12 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
4 possible matches (shared part number, not a government interchangeability claim): 3020-00-021-3125, 3020-00-021-3126, 3020-00-021-3127. Verify interchangeability with system specifications before substitution.
Key specifications for 1412542-12: Bore Nominal Diameter: 0.240 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.620 INCHES BOTH ENDS IN; Teeth Quantity: 90; Body Style: PLAIN, SOLID. 20 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.