The Gear,bevel, cataloged under National Stock Number 3020-01-449-9723, 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 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-449-9723 |
| Primary Part Number | 211071821 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Keyway Nominal Width | 0.127 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.501 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.250 INCHES SECOND END IN |
| Teeth Quantity | 18 |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 45.0000 DEGREES |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Precision Classification | QUALITY NUMBER 4 |
| Teeth Type | STRAIGHT |
| Nominal Overall Length | 1.008 INCHES IN |
| Style Designator | PERIPHERAL FACE, BACK HUB PROTRUDING |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.5000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 1.618 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.314 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | NICKEL ALLOY OVERALL |
| 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 |
|---|---|
| 582-6408329 FIND 58 | Naval Sea Systems Command (USA) |
| 211071821 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DF2012-72 FIND 58 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6408329 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-449-9723 is a Gear,bevel, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-449-9723 has 2 manufacturer part numbers on file: 582-6408329 FIND 58 (Naval Sea Systems Command), 211071821 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-449-9794. Verify interchangeability with system specifications before substitution.
Key specifications for 211071821: Keyway Nominal Width: 0.127 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.501 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.250 INCHES SECOND END IN; Teeth Quantity: 18. 18 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.