The Gear,spur, cataloged under National Stock Number 3020-01-312-4510, 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 Palfinger Marine Usa, Llc. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-312-4510 |
| Primary Part Number | D406054ITEM19 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Palfinger Marine Usa, Llc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.250 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 0.939 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.625 INCHES FIRST END IN |
| Body Style | PLAIN, SOLID |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.813 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 2.250 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.581 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | PLASTIC OVERALL |
| Face Nominal Width | 1.437 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 |
|---|---|
| D406054ITEM19 PRIMARY | Palfinger Marine Usa, Llc (USA) |
| Reference | Meaning |
|---|---|
| D406054 | D/9 Drawing number reference only Palfinger Marine Usa, Llc |
NSN 3020-01-312-4510 is a Gear,spur, manufactured by Palfinger Marine Usa, Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-312-4510 has 1 manufacturer part number on file: D406054ITEM19 (Palfinger Marine Usa, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-313-0640, 3010-01-313-0672. Verify interchangeability with system specifications before substitution.
Key specifications for D406054ITEM19: Keyway Nominal Width: 0.250 INCHES BOTH ENDS IN; Bore Nominal Diameter: 0.939 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.625 INCHES FIRST END IN; 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.