The Gear,helical, cataloged under National Stock Number 3020-00-342-5891, 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 Flowserve Corp Dba Automax Actuators Div Flowserve Us Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-342-5891 |
| Primary Part Number | 9-91505 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Flowserve Corp Dba Automax Actuators Div Flowserve Us Company |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.668 INCHES BOTH ENDS IN |
| Helix Angle | 18.5000 DEGREES |
| Hub Nominal Diameter | 2.362 INCHES FIRST END IN |
| Teeth Quantity | 16 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 2.4510 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 60.0 ROCKWELL C MINIMUM AND 65.0 ROCKWELL C MAXIMUM BODY |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.0125 INCHES NOMINAL IN |
| Hub Style Designator | 1 GROOVE FIRST END |
| Spline Quantity | 21 BOTH ENDS |
| Nominal Outside Diameter | 3.368 INCHES IN |
| End Nominal Diameter | 2.3622 INCHES FIRST END IN |
| Pressure Angle | 23.0000 DEGREES |
| Material | STEEL COMP 4620 OVERALL |
| First Groove Nominal Diameter | 2.120 INCHES FIRST END IN |
| First Groove Nominal Width | 0.120 INCHES FIRST END IN |
| Spline Pitch Diameter | 1.7500 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 1.812 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 |
|---|---|
| 9-91505 PRIMARY | Flowserve Corp Dba Automax Actuators Div Flowserve Us Company (USA) |
| Reference | Meaning |
|---|---|
| 9-91505 | 5/9 Secondary reference Timken Gears & Services Inc. Div Philadelphia Gear |
NSN 3020-00-342-5891 is a Gear,helical, manufactured by Flowserve Corp Dba Automax Actuators Div Flowserve Us Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-342-5891 has 1 manufacturer part number on file: 9-91505 (Flowserve Corp Dba Automax Actuators Div Flowserve Us Company).
Key specifications for 9-91505: Bore Nominal Diameter: 1.668 INCHES BOTH ENDS IN; Helix Angle: 18.5000 DEGREES; Hub Nominal Diameter: 2.362 INCHES FIRST END IN; Teeth Quantity: 16. 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.