The Gear,bevel, cataloged under National Stock Number 3020-01-239-9093, 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 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-239-9093 |
| Primary Part Number | 523-5256781 DETAIL 7-D |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Keyway Nominal Width | 0.219 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.875 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.250 INCHES SECOND END IN |
| Teeth Quantity | 20 |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | STRAIGHT |
| Nominal Overall Length | 4.375 INCHES IN |
| Style Designator | PERIPHERAL FACE, BACK HUB PROTRUDING |
| Pitch Diameter | 7.0000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 8.352 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 2.094 INCHES BOTH ENDS IN |
| Material | STEEL BODY |
| Face Nominal Width | 2.000 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 |
|---|---|
| 523-5256781 DETAIL 7-D PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 523-5256781 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-239-9093 is a Gear,bevel, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-239-9093 has 1 manufacturer part number on file: 523-5256781 DETAIL 7-D (Naval Sea Systems Command).
Key specifications for 523-5256781 DETAIL 7-D: Keyway Nominal Width: 0.219 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.875 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.250 INCHES SECOND END IN; Teeth Quantity: 20. 15 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.