The Gear,spur, cataloged under National Stock Number 3020-01-414-4391, 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 Naval Sea Systems Command. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-414-4391 |
| Primary Part Number | 845-6556493 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.380 INCHES BOTH ENDS IN |
| Teeth Quantity | 18 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | ACCURACY GRADE 10 |
| Style Designator | HUBLESS, RECESSED BODY |
| Material Document and Classification | ASTM A304 ASSN STD 1ST MATERIAL RESPONSE AND AMS2301 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.2500 INCHES NOMINAL IN |
| Nominal Outside Diameter | 2.584 INCHES IN |
| Surface Treatment | CARBON OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4320H OVERALL |
| Body Recess Nominal Depth | 0.482 INCHES BOTH ENDS IN |
| Face Nominal Width | 1.500 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 845-6556493 PRIMARY | Naval Sea Systems Command (USA) |
| 845-6603141-44 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6556493 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-414-4391 is a Gear,spur, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-414-4391 has 2 manufacturer part numbers on file: 845-6556493 (Naval Sea Systems Command), 845-6603141-44 (Naval Sea Systems Command).
Key specifications for 845-6556493: Bore Nominal Diameter: 1.380 INCHES BOTH ENDS IN; Teeth Quantity: 18; Body Style: PLAIN, SOLID; Bore Style: PLAIN BOTH ENDS. 14 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 3020-01-414-4391 has DEMIL Code Q. 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.