The Gear,helical, cataloged under National Stock Number 3020-00-537-0153, 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 27 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-537-0153 |
| Primary Part Number | 5126904 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.252 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.1875 INCHES BOTH ENDS IN |
| Helix Angle | 20.3166 DEGREES |
| Hub Nominal Diameter | 1.7600 INCHES SECOND END IN |
| Hub Nominal Diameter | 1.9200 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.1400 INCHES SECOND END IN |
| Teeth Quantity | 66 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Mounting Hole Type and Quantity | 3 THREADED AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.0920 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | ONE PROTRUDING HUB, ONE RECESSED HUB |
| Pitch Diameter | 7.0378 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Mounting Hole Nominal Thread Size | 0.3120 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Nominal Outside Diameter | 7.3320 INCHES IN |
| Mounting Hole Thread Quantity Per Inch | 18 AXIALLY THROUGH BODY FIRST END |
| Nominal Distance From Bore Center to Keyway Bottom | 0.7212 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Bolt Hole Circle Nominal Diameter | 6.561 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.500 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 |
|---|---|
| 1DD417 | Oshkosh Defense Llc (USA) |
| 005154T | Kovatch Corp. (USA) |
| 5126904 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
| Reference | Meaning |
|---|---|
| 1DD417 | 5/9 Secondary reference Oshkosh Corp |
| PC5126904 | 5/9 Secondary reference Power Components (deutschland) Gmbh |
| K-5126904 | 5/9 Secondary reference Korody-Colyer Corp a Cr Industries Co |
| 5126904 | 5/9 Secondary reference General Motors Corp |
NSN 3020-00-537-0153 is a Gear,helical, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-537-0153 has 3 manufacturer part numbers on file: 1DD417 (Oshkosh Defense Llc), 005154T (Kovatch Corp.), 5126904 (Rolls-Royce Solutions America Inc).
Key specifications for 5126904: Keyway Nominal Width: 0.252 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.1875 INCHES BOTH ENDS IN; Helix Angle: 20.3166 DEGREES; Hub Nominal Diameter: 1.7600 INCHES SECOND END IN. 27 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.