The Gear,helical, cataloged under National Stock Number 3020-00-437-0263, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 23 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-437-0263 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.625 INCHES BOTH ENDS IN |
| Helix Angle | 4.0000 DEGREES |
| Hub Nominal Diameter | 0.750 INCHES FIRST END IN |
| Teeth Quantity | 60 |
| Surface Treatment Document and Classification | QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | TAPERED BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.176 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Nominal Overall Length | 0.375 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE AND AISI/SAE 1117 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.7958 INCHES NOMINAL IN |
| Hub Style Designator | 1 GROOVE FIRST END |
| Nominal Outside Diameter | 0.810 INCHES IN |
| Surface Treatment | CADMIUM OVERALL |
| Nominal Distance From End to First Groove | 0.036 INCHES FIRST END IN |
| Pressure Angle | 30.0000 DEGREES |
| Material | STEEL COMP 1117 OVERALL |
| First Groove Nominal Diameter | 0.710 INCHES FIRST END IN |
| First Groove Nominal Width | 0.047 INCHES FIRST END IN |
| Face Nominal Width | 0.199 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 |
| Reference | Meaning |
|---|---|
| 27598-01 | 3/9 Design control — primary reference Lucas Aerospace Power Equipment Corporation |
| 27598 | C/1 Advisory reference — outside the item-of-supply concept Safran Power Usa Llc |
| 27598 | 5/9 Secondary reference Lucas Aerospace Power Equipment Corporation |
| 27598-01 | C/1 Advisory reference — outside the item-of-supply concept Safran Power Usa Llc |
NSN 3020-00-437-0263 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5915-00-589-2977, 5995-01-153-1954. Verify interchangeability with system specifications before substitution.
Key specifications for 3020-00-437-0263: Bore Nominal Diameter: 0.625 INCHES BOTH ENDS IN; Helix Angle: 4.0000 DEGREES; Hub Nominal Diameter: 0.750 INCHES FIRST END IN; Teeth Quantity: 60. 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.