The Gear,bevel, cataloged under National Stock Number 3020-01-378-3089, 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 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-378-3089 |
| Primary Part Number | 752-6405258-198 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Keyway Nominal Width | 0.251 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.250 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.000 INCHES SECOND END IN |
| Teeth Quantity | 24 |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 45.0000 DEGREES |
| Tooth Direction | RIGHT |
| Bore Style | W/ 2 KEYWAYS BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES SECOND END IN |
| Precision Classification | QUALITY NUMBER 12 |
| Teeth Type | SPIRAL |
| Nominal Overall Length | 1.742 INCHES IN |
| Style Designator | SIDE FACE, BACK HUB PROTRUDING |
| Material Document and Classification | MIL-S-5000, COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.0000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 4.219 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.747 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Body Recess Nominal Depth | 0.782 INCHES SECOND END IN |
| Face Nominal Width | 0.849 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 |
|---|---|
| 752-6405258-198 PRIMARY | Naval Sea Systems Command (USA) |
| 211017580 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 752-6405258 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-378-3089 is a Gear,bevel, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-378-3089 has 2 manufacturer part numbers on file: 752-6405258-198 (Naval Sea Systems Command), 211017580 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-394-7942. Verify interchangeability with system specifications before substitution.
Key specifications for 752-6405258-198: Keyway Nominal Width: 0.251 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.250 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.000 INCHES SECOND END IN; Teeth Quantity: 24. 22 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.