The Gear,worm, cataloged under National Stock Number 3020-01-042-0775, 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 L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-042-0775 |
| Primary Part Number | 4256A420-1 |
| Item Name | Gear,worm |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.312 INCHES BOTH ENDS IN |
| Helix Angle | 3.5833 DEGREES |
| Pitch Diameter | 0.5000 INCHES NOMINAL IN |
| Pressure Angle | 14.5000 DEGREES |
| 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 |
|---|---|
| 4256A450 PIECE 24 | L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division (USA) |
| 4256A420-1 PRIMARY | L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division (USA) |
| Reference | Meaning |
|---|---|
| 4256A450 PIECE | C/1 Advisory reference — outside the item-of-supply concept L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division |
NSN 3020-01-042-0775 is a Gear,worm, manufactured by L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-042-0775 has 2 manufacturer part numbers on file: 4256A450 PIECE 24 (L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division), 4256A420-1 (L-3 Communications Westwood Corporation Dba Edi Division Div Tano Division).
Key specifications for 4256A420-1: Bore Nominal Diameter: 0.312 INCHES BOTH ENDS IN; Helix Angle: 3.5833 DEGREES; Pitch Diameter: 0.5000 INCHES NOMINAL IN; Pressure Angle: 14.5000 DEGREES. 4 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.