The Gear,spur, cataloged under National Stock Number 3020-00-912-8079, 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 L3 Technologies, Inc. Div Ocean Systems. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-912-8079 |
| Primary Part Number | 3151393 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | L3 Technologies, Inc. Div Ocean Systems |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.6640 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.8750 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.8750 INCHES SECOND END IN |
| Teeth Quantity | 46 |
| Body Style | PLAIN, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.2675 INCHES BOTH ENDS IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.4375 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 12 BOTH ENDS |
| Nominal Outside Diameter | 1.4985 INCHES IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4130 OVERALL |
| Spline Pitch Diameter | 0.6000 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 0.430 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 |
|---|---|
| 3151393 PRIMARY | L3 Technologies, Inc. Div Ocean Systems (USA) |
| Reference | Meaning |
|---|---|
| 3151393 | 5/9 Secondary reference Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div |
NSN 3020-00-912-8079 is a Gear,spur, manufactured by L3 Technologies, Inc. Div Ocean Systems, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-912-8079 has 1 manufacturer part number on file: 3151393 (L3 Technologies, Inc. Div Ocean Systems).
Key specifications for 3151393: Bore Nominal Diameter: 0.6640 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.8750 INCHES FIRST END IN; Hub Nominal Diameter: 0.8750 INCHES SECOND END IN; Teeth Quantity: 46. 21 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.