The Gear,helical, cataloged under National Stock Number 3020-01-074-3360, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-074-3360 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Keyway Nominal Width | 0.063 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.276 INCHES BOTH ENDS IN |
| Helix Angle | 21.8394 DEGREES |
| Hub Nominal Diameter | 0.460 INCHES FIRST END IN |
| Teeth Quantity | 61 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.164 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 12 |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 37.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 1.0268 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 1.0604 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.182 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Face Nominal Width | 0.250 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 2078986-1 | 3/2 Design control — primary reference U.S. Government activity |
| 2078986 | D/9 Drawing number reference only U.S. Government activity |
NSN 3020-01-074-3360 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5905-01-183-6222. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-01-074-3360: Keyway Nominal Width: 0.063 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.276 INCHES BOTH ENDS IN; Helix Angle: 21.8394 DEGREES; Hub Nominal Diameter: 0.460 INCHES FIRST 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.
NSN 3020-01-074-3360 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.