The Gear,internal, cataloged under National Stock Number 3020-01-379-3097, 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 19 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-379-3097 |
| Primary Part Number | 211071415 |
| Item Name | Gear,internal |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.752 INCHES SECOND END IN |
| Teeth Quantity | 42 |
| Second Step Nominal Diameter | 5.320 INCHES SECOND END IN |
| Body Style | PLAIN, SOLID |
| Bore Style | STRAIGHT SPLINE SECOND END |
| First Step Nominal Length | 0.219 INCHES SECOND END IN |
| Teeth Type | SPUR |
| Nominal Overall Length | 3.940 INCHES IN |
| Style Designator | SOLID BACK RING, PROTRUDING HUB |
| Pitch Diameter | 4.2000 INCHES NOMINAL IN |
| First Step Nominal Diameter | 4.498 INCHES SECOND END IN |
| Hub Style Designator | 2 STEPS SECOND END |
| Spline Quantity | 9 SECOND END |
| End Nominal Length | 0.846 INCHES SECOND END IN |
| Nominal Outside Diameter | 5.342 INCHES IN |
| End Nominal Diameter | 3.500 INCHES SECOND END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.975 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 |
|---|---|
| 211071415 PRIMARY | Naval Sea Systems Command (USA) |
| 801-6406709 FIND 43 | Naval Sea Systems Command (USA) |
| 6406709 FIND 43 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6406709 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-379-3097 is a Gear,internal, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-379-3097 has 3 manufacturer part numbers on file: 211071415 (Naval Sea Systems Command), 801-6406709 FIND 43 (Naval Sea Systems Command), 6406709 FIND 43 (Naval Sea Systems Command).
8 possible matches (shared part number, not a government interchangeability claim): 3040-01-383-5253, 3020-01-383-5531, 3020-01-416-3312. Verify interchangeability with system specifications before substitution.
Key specifications for 211071415: Bore Nominal Diameter: 1.752 INCHES SECOND END IN; Teeth Quantity: 42; Second Step Nominal Diameter: 5.320 INCHES SECOND END IN; Body Style: PLAIN, SOLID. 19 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.