The Gear,helical, cataloged under National Stock Number 3020-00-976-1043, 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 Rexnord Industries Llc. Government technical data includes 22 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-976-1043 |
| Primary Part Number | 322391 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Rexnord Industries Llc |
| Status | ACTIVE |
| Keyway Nominal Width | 1.000 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 3.875 INCHES BOTH ENDS IN |
| Helix Angle | 10.0627 DEGREES |
| Hub Nominal Diameter | 6.375 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.563 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.094 INCHES FIRST END IN |
| Teeth Quantity | 92 |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 285.0 BRINELL STANDARD MINIMUM AND 325.0 BRINELL STANDARD MAXIMUM OVERALL |
| Style Designator | RECESSED HUBS |
| Material Document and Classification | MIL-S-19434,CLASS5 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 11.5910 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 11.838 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 2.450 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 7.000 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 |
|---|---|
| 322391 PRIMARY | Rexnord Industries Llc (USA) |
NSN 3020-00-976-1043 is a Gear,helical, manufactured by Rexnord Industries Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-976-1043 has 1 manufacturer part number on file: 322391 (Rexnord Industries Llc).
Key specifications for 322391: Keyway Nominal Width: 1.000 INCHES BOTH ENDS IN; Bore Nominal Diameter: 3.875 INCHES BOTH ENDS IN; Helix Angle: 10.0627 DEGREES; Hub Nominal Diameter: 6.375 INCHES SECOND END IN. 22 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.