The Gear,helical, cataloged under National Stock Number 3020-00-732-0197, 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 Grimes Aerospace Company. Government technical data includes 21 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 | 3020-00-732-0197 |
| Primary Part Number | A8404A3 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.1850 INCHES BOTH ENDS IN |
| Helix Angle | 7.1166 DEGREES |
| Hub Nominal Diameter | 0.500 INCHES FIRST END IN |
| Teeth Quantity | 30 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 2 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.005 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Nominal Overall Length | 0.345 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 0.6220 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 0.666 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | COPPER ALLOY BODY |
| Material | PLASTIC TEETH |
| Mounting Hole Thread Series Designator | UNS TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.340 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 |
|---|---|
| A8404A3 PRIMARY | Grimes Aerospace Company (USA) |
NSN 3020-00-732-0197 is a Gear,helical, manufactured by Grimes Aerospace Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-732-0197 has 1 manufacturer part number on file: A8404A3 (Grimes Aerospace Company).
2 possible matches (shared part number, not a government interchangeability claim): 6220-00-797-1532, 3020-00-895-7212. Verify interchangeability with system specifications before substitution.
Key specifications for A8404A3: Bore Nominal Diameter: 0.1850 INCHES BOTH ENDS IN; Helix Angle: 7.1166 DEGREES; Hub Nominal Diameter: 0.500 INCHES FIRST END IN; Teeth Quantity: 30. 21 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.