The Gear,spur, cataloged under National Stock Number 3020-01-121-9740, 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 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-121-9740 |
| Primary Part Number | 355443-1 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| Keyway Nominal Width | 0.156 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.391 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.812 INCHES SECOND END IN |
| Teeth Quantity | 95 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.062 INCHES SECOND END IN |
| First Step Nominal Length | 0.187 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 1.9791 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 0.812 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| End Nominal Length | 0.062 INCHES FIRST END IN |
| Nominal Outside Diameter | 2.021 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.273 INCHES BOTH ENDS IN |
| Surface Treatment | PASSIVATE OVERALL |
| End Nominal Diameter | 0.625 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Nominal Width | 0.312 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 |
NSN 3020-01-121-9740 is a Gear,spur, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-121-9740 has 2 manufacturer part numbers on file: 355443-1 (Raytheon Company), 355443-1 (Raytheon Company Dba Raytheon Co).
Key specifications for 355443-1: Keyway Nominal Width: 0.156 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.391 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.812 INCHES SECOND END IN; Teeth Quantity: 95. 23 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.