The Gear,spur, cataloged under National Stock Number 3020-01-256-8942, 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 Ametek, Inc. Div Aerospace & Defense. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-256-8942 |
| Primary Part Number | 122CA420-1TR |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ametek, Inc. Div Aerospace & Defense |
| Status | ACTIVE |
| Bore Nominal Diameter | 4.000 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 6.300 INCHES FIRST END IN |
| Teeth Quantity | 19 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.000 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 7.6000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 5.500 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 4.500 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 |
|---|---|
| 122CA420-1TR PRIMARY | Ametek, Inc. Div Aerospace & Defense (USA) |
| 122CA420-1TR | Logic Spa (ITA) |
NSN 3020-01-256-8942 is a Gear,spur, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-256-8942 has 2 manufacturer part numbers on file: 122CA420-1TR (Ametek, Inc. Div Aerospace & Defense), 122CA420-1TR (Logic Spa).
Key specifications for 122CA420-1TR: Bore Nominal Diameter: 4.000 INCHES BOTH ENDS IN; Hub Nominal Diameter: 6.300 INCHES FIRST END IN; Teeth Quantity: 19; Body Style: PLAIN, SOLID. 13 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.