The Gear,antibacklash,spur, cataloged under National Stock Number 3020-00-889-7440, 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 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-889-7440 |
| Primary Part Number | 1240136-93 |
| Item Name | Gear,antibacklash,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 | 0.187 INCHES BOTH ENDS IN |
| Backlash Designation | GRADE C |
| Teeth Quantity | 93 |
| Nominal Distance Between Body Face and Protruding Hub End | 0.187 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 12 |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 0.9681 INCHES MINIMUM AND 0.9688 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Surface Treatment | ANODIZE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 2024 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 |
|---|---|
| L310000663 | Lockheed Martin Librascope Corporation (USA) |
| 1240136-93 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 3020-00-889-7440 is a Gear,antibacklash,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 3020-00-889-7440 has 2 manufacturer part numbers on file: L310000663 (Lockheed Martin Librascope Corporation), 1240136-93 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 1240136-93: Bore Nominal Diameter: 0.187 INCHES BOTH ENDS IN; Backlash Designation: GRADE C; Teeth Quantity: 93; Nominal Distance Between Body Face and Protruding Hub End: 0.187 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.