The Gear,helical, cataloged under National Stock Number 3020-00-976-1044, 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 29 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-976-1044 |
| Primary Part Number | 322389 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Rexnord Industries Llc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.050 INCHES FIRST END IN |
| Helix Angle | 30.0483 DEGREES |
| Teeth Quantity | 93 |
| Body Style | WEBBED, OFFSET, SOLID |
| Tooth Direction | LEFT |
| Bore Style | TAPERED W/KEYWAY FIRST END |
| Mounting Hole Type and Quantity | 2 THREADED AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.500 INCHES FIRST END IN |
| First Step Nominal Length | 0.250 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 285.0 BRINELL STANDARD MINIMUM AND 325.0 BRINELL STANDARD MAXIMUM OVERALL |
| Style Designator | PROTRUDING HUB, RECESSED BODY |
| Taper Major Nominal Diameter | 2.243 INCHES FIRST END IN |
| Material Document and Classification | MIL-S-19434,CLASS5 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 11.6250 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 4.250 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Mounting Hole Nominal Thread Size | 0.750 INCHES AXIALLY THROUGH BODY FIRST END IN |
| End Nominal Length | 2.250 INCHES FIRST END IN |
| Nominal Outside Diameter | 11.842 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.503 INCHES FIRST END IN |
| End Nominal Diameter | 2.755 INCHES FIRST END IN |
| Material | STEEL OVERALL |
| Bolt Hole Circle Nominal Diameter | 6.750 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 |
| Body Recess Nominal Depth | 0.875 INCHES SECOND END IN |
| Face Nominal Width | 2.750 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 |
|---|---|
| 322389 PRIMARY | Rexnord Industries Llc (USA) |
NSN 3020-00-976-1044 is a Gear,helical, manufactured by Rexnord Industries Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-976-1044 has 1 manufacturer part number on file: 322389 (Rexnord Industries Llc).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-328-8011, 4810-01-507-7343. Verify interchangeability with system specifications before substitution.
Key specifications for 322389: Keyway Nominal Width: 0.050 INCHES FIRST END IN; Helix Angle: 30.0483 DEGREES; Teeth Quantity: 93; Body Style: WEBBED, OFFSET, SOLID. 29 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.