The Gear,helical, cataloged under National Stock Number 3020-00-409-4537, 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 Telemechanics Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-409-4537 |
| Primary Part Number | 196436 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.2520 INCHES BOTH ENDS IN |
| Helix Angle | 23.0000 DEGREES |
| Teeth Quantity | 24 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Flange Nominal Thickness | 0.035 INCHES IN |
| Flange Nominal Diameter | 1.114 INCHES IN |
| Bore Style | PLAIN BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Style Designator | FLANGED END |
| Tooth Form | STANDARD |
| Nominal Distance Between Outer Body Face and Inner Flange Face | 0.221 INCHES IN |
| Nominal Outside Diameter | 0.8600 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | IRON CAST BODY |
| Material | STEEL HUB |
| Face Nominal Width | 0.221 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 |
|---|---|
| 196436 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 196436 | C/1 Advisory reference — outside the item-of-supply concept American Telephone and Telegraph Co |
NSN 3020-00-409-4537 is a Gear,helical, manufactured by Telemechanics Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-409-4537 has 1 manufacturer part number on file: 196436 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-2076. Verify interchangeability with system specifications before substitution.
Key specifications for 196436: Bore Nominal Diameter: 0.2520 INCHES BOTH ENDS IN; Helix Angle: 23.0000 DEGREES; Teeth Quantity: 24; Body Style: PLAIN, SOLID. 18 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.