The Gear,antibacklash,spur, cataloged under National Stock Number 3020-00-204-9504, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-204-9504 |
| Item Name | Gear,antibacklash,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.250 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.313 INCHES FIRST END IN |
| Teeth Quantity | 84 |
| Clamping Surface Nominal Length | 0.250 INCHES FIRST END IN |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE FIRST GEAR |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE SECOND GEAR |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.313 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB |
| Material Document and Classification | QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE FIRST GEAR |
| Material Document and Classification | QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE SECOND GEAR |
| Pitch Diameter | 1.3115 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Hub Style Designator | SPLIT FIRST END |
| Nominal Outside Diameter | 1.343 INCHES IN |
| Surface Treatment | PASSIVATE HUB |
| Surface Treatment | ANODIZE SECOND GEAR |
| Surface Treatment | ANODIZE FIRST GEAR |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL CORROSION RESISTING SPRING |
| Material | ALUMINUM ALLOY 2024 SECOND GEAR |
| Material | ALUMINUM ALLOY 2024 FIRST GEAR |
| Material | STEEL COMP 303 HUB |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY FREE FROM MERCURY CONTAMINATION |
| Attachment Method | CLAMP |
| 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 |
| Reference | Meaning |
|---|---|
| 63351-1 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Controls, Inc. Div Actuation Division |
| 63351-001 | 3/1 Design control — primary reference Southern Gear & Machine Inc |
| 63351-001 | 7/1 Vendor item drawing reference Curtiss-Wright Controls, Inc. Div Actuation Division |
NSN 3020-00-204-9504 is a Gear,antibacklash,spur, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
Key specifications for 3020-00-204-9504: Bore Nominal Diameter: 0.250 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.313 INCHES FIRST END IN; Teeth Quantity: 84; Clamping Surface Nominal Length: 0.250 INCHES FIRST END IN. 28 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.