The Gear,helical, cataloged under National Stock Number 3020-00-441-5958, 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 Rolls-Royce Solutions America Inc. Government technical data includes 25 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-441-5958 |
| Primary Part Number | 5122920 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 EXTERNALLY LUBRICATED BEARING |
| Bore Nominal Diameter | 1.8750 INCHES BOTH ENDS IN |
| Helix Angle | 17.0000 DEGREES |
| Hub Nominal Diameter | 2.500 INCHES SECOND END IN |
| Hub Nominal Diameter | 4.812 INCHES FIRST END IN |
| Teeth Quantity | 40 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | LEFT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 3 THREADED AXIALLY THROUGH FLANGE |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES SECOND END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 4.1250 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Mounting Hole Nominal Thread Size | 0.375 INCHES AXIALLY THROUGH FLANGE IN |
| Nominal Outside Diameter | 4.5000 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Bolt Hole Circle Nominal Diameter | 3.000 INCHES AXIALLY THROUGH FLANGE IN |
| Mounting Hole Thread Series Designator | UNF AXIALLY THROUGH FLANGE |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 1.188 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 |
|---|---|
| 5122920 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
| 016643T | Kovatch Corp. (USA) |
| Reference | Meaning |
|---|---|
| 3020004415958 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 3020004415958 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| PC5122920 | 5/9 Secondary reference Power Components (deutschland) Gmbh |
NSN 3020-00-441-5958 is a Gear,helical, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-441-5958 has 2 manufacturer part numbers on file: 5122920 (Rolls-Royce Solutions America Inc), 016643T (Kovatch Corp.).
Key specifications for 5122920: Furnished Items and Quantity: 1 EXTERNALLY LUBRICATED BEARING; Bore Nominal Diameter: 1.8750 INCHES BOTH ENDS IN; Helix Angle: 17.0000 DEGREES; Hub Nominal Diameter: 2.500 INCHES SECOND END IN. 25 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.