The Gear,spur, cataloged under National Stock Number 3020-00-421-4463, 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 Raytheon Company Dba Raytheon Co. Government technical data includes 29 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-421-4463 |
| Primary Part Number | 370406 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.000 INCHES COUNTER BORE SECOND END IN |
| Backlash Designation | GRADE B |
| Teeth Quantity | 87 |
| Second Step Nominal Diameter | 2.670 INCHES FIRST END IN |
| Body Style | WEBBED, OFFSET, SOLID |
| Counterbore Nominal Diameter | 2.1200 INCHES COUNTER BORE SECOND END IN |
| Third Step Nominal Diameter | 3.190 INCHES FIRST END IN |
| Bore Style | W/COUNTERBORE COUNTER BORE SECOND END |
| Nominal Distance Between Body Face and Protruding Hub End | 1.181 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.654 INCHES SECOND END IN |
| First Step Nominal Length | 0.373 INCHES SECOND END IN |
| First Step Nominal Length | 0.493 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 11 |
| Second Step Nominal Length | 0.163 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | QQ-A-250/11 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-679 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.6250 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 2.562 INCHES FIRST END IN |
| First Step Nominal Diameter | 2.410 INCHES SECOND END IN |
| Hub Style Designator | 3 STEPS FIRST END |
| Hub Style Designator | 1 STEP SECOND END |
| End Nominal Length | 0.380 INCHES FIRST END IN |
| End Nominal Length | 0.281 INCHES SECOND END IN |
| Nominal Outside Diameter | 3.707 INCHES IN |
| End Nominal Diameter | 2.312 INCHES SECOND END IN |
| End Nominal Diameter | 2.526 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 6061 AND COPPER ALLOY 642 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3020-00-421-4463 is a Gear,spur, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-421-4463 has 2 manufacturer part numbers on file: 370406 (Raytheon Company), 370406 (Raytheon Company Dba Raytheon Co).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-263-3195. Verify interchangeability with system specifications before substitution.
Key specifications for 370406: Bore Nominal Diameter: 2.000 INCHES COUNTER BORE SECOND END IN; Backlash Designation: GRADE B; Teeth Quantity: 87; Second Step Nominal Diameter: 2.670 INCHES FIRST END IN. 29 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.
NSN 3020-00-421-4463 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.