The Gear,antibacklash,spur, cataloged under National Stock Number 3020-01-211-4162, 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 The Boeing Company. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-211-4162 |
| Primary Part Number | 7-317221313-3 |
| Item Name | Gear,antibacklash,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.249 INCHES BOTH ENDS IN |
| Teeth Quantity | 18 |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.237 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 2.2500 INCHES NOMINAL IN |
| Nominal Outside Diameter | 2.635 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 2024 SECOND GEAR |
| Material | ALUMINUM ALLOY 2024 FIRST GEAR |
| Material | STEEL CORROSION RESISTING HUB |
| Face Nominal Width | 0.190 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 |
|---|---|
| 7-317221313-3 | Southern Gear & Machine Inc (USA) |
| 7-317221313-3 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 7-317221313-3 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
| 7-317221313-3 | 5/9 Secondary reference Trivent Engineering, Incorporated Div Trivent Engineering Inc. |
| 7-317221313-3 | 5/9 Secondary reference Jaygar Associates Inc |
| 7-317221313 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 3020-01-211-4162 is a Gear,antibacklash,spur, manufactured by The Boeing Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-211-4162 has 2 manufacturer part numbers on file: 7-317221313-3 (Southern Gear & Machine Inc), 7-317221313-3 (The Boeing Company).
Key specifications for 7-317221313-3: Bore Nominal Diameter: 0.249 INCHES BOTH ENDS IN; Teeth Quantity: 18; Bore Style: PLAIN BOTH ENDS; Nominal Distance Between Body Face and Protruding Hub End: 0.237 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.