The Gear,bevel, cataloged under National Stock Number 3020-00-326-3489, 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 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-326-3489 |
| Primary Part Number | S1635-20023 |
| Item Name | Gear,bevel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Bore Nominal Diameter | 10.9775 INCHES BOTH ENDS IN |
| Teeth Quantity | 57 |
| Body Style | PLAIN, SOLID |
| Pitch Angle | 99.3832 DEGREES |
| Tooth Direction | LEFT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.2500 INCHES SECOND END IN |
| First Step Nominal Length | 1.1900 INCHES SECOND END IN |
| Teeth Type | SPIRAL |
| Nominal Overall Length | 2.3630 INCHES IN |
| Style Designator | SIDE FACE, BACK HUB PROTRUDING |
| Pitch Diameter | 18.7840 INCHES NOMINAL IN |
| First Step Nominal Diameter | 12.3750 INCHES SECOND END IN |
| Hub Style Designator | 1 STEP SECOND END |
| Spline Quantity | 86 BOTH ENDS |
| End Nominal Length | 0.0600 INCHES SECOND END IN |
| Nominal Outside Diameter | 18.9300 INCHES IN |
| End Nominal Diameter | 11.2500 INCHES SECOND END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Spline Pitch Diameter | 10.7500 INCHES NOMINAL BOTH ENDS IN |
| Body Recess Nominal Depth | 1.0795 INCHES FIRST END IN |
| Face Nominal Width | 2.8750 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 |
|---|---|
| S1635-20023 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| S1635-20023-3 | C/1 Advisory reference — outside the item-of-supply concept Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 3020-00-326-3489 is a Gear,bevel, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-326-3489 has 1 manufacturer part number on file: S1635-20023 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S1635-20023: Bore Nominal Diameter: 10.9775 INCHES BOTH ENDS IN; Teeth Quantity: 57; Body Style: PLAIN, SOLID; Pitch Angle: 99.3832 DEGREES. 23 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.