The Gear,helical, cataloged under National Stock Number 3020-01-139-9696, 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 Kalmar AC Inc. Government technical data includes 25 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-139-9696 |
| Primary Part Number | 4908624 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Kalmar AC Inc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.156 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.000 INCHES BOTH ENDS IN |
| Helix Angle | 20.0000 DEGREES |
| Hub Nominal Diameter | 1.500 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.500 INCHES SECOND END IN |
| Teeth Quantity | 56 |
| Body Style | WEBBED, OFFSET, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.313 INCHES FIRST END IN |
| First Step Nominal Length | 0.063 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | ONE PROTRUDING HUB, ONE RECESSED HUB |
| Pitch Diameter | 6.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 4.500 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| End Nominal Length | 0.250 INCHES SECOND END IN |
| Nominal Outside Diameter | 6.2143 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.578 INCHES BOTH ENDS IN |
| End Nominal Diameter | 1.875 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 1.062 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 |
|---|---|
| 4908624 PRIMARY | Kalmar AC Inc (USA) |
| Reference | Meaning |
|---|---|
| 4910761-8 | C/1 Advisory reference — outside the item-of-supply concept Kalmar AC Inc |
NSN 3020-01-139-9696 is a Gear,helical, manufactured by Kalmar AC Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-139-9696 has 1 manufacturer part number on file: 4908624 (Kalmar AC Inc).
Key specifications for 4908624: Keyway Nominal Width: 0.156 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.000 INCHES BOTH ENDS IN; Helix Angle: 20.0000 DEGREES; Hub Nominal Diameter: 1.500 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.