The Gear,helical, cataloged under National Stock Number 3020-00-517-0641, 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 Brinkley Technology Group Llc Dba Hercules Manufacturing. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-517-0641 |
| Primary Part Number | 46138B |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Brinkley Technology Group Llc Dba Hercules Manufacturing |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.125 INCHES BOTH ENDS IN |
| Helix Angle | 39.5167 DEGREES |
| Hub Nominal Diameter | 2.000 INCHES SECOND END IN |
| Hub Nominal Diameter | 2.000 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.250 INCHES SECOND END IN |
| Teeth Quantity | 29 |
| Body Style | WEBBED, OFFSET, SOLID |
| Tooth Direction | LEFT |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.049 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 12.7 ROCKWELL C MINIMUM AND 21.7 ROCKWELL C MAXIMUM BODY |
| Hardness Rating | 12.7 ROCKWELL C MINIMUM AND 21.7 ROCKWELL C MAXIMUM TEETH |
| Style Designator | ONE PROTRUDING HUB, ONE RECESSED HUB |
| Pitch Diameter | 3.7592 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 3.957 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.749 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 |
|---|---|
| 46138B PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 46138B | 5/9 Secondary reference Hercules Engine Co Inc |
NSN 3020-00-517-0641 is a Gear,helical, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-517-0641 has 1 manufacturer part number on file: 46138B (Brinkley Technology Group Llc Dba Hercules Manufacturing).
Key specifications for 46138B: Bore Nominal Diameter: 1.125 INCHES BOTH ENDS IN; Helix Angle: 39.5167 DEGREES; Hub Nominal Diameter: 2.000 INCHES SECOND END IN; Hub Nominal Diameter: 2.000 INCHES FIRST END IN. 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.