The Gear,spur, cataloged under National Stock Number 3020-00-753-2280, 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 L3 Technologies, Inc. Div L3 Keo. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-00-753-2280 |
| Primary Part Number | A554-56 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.375 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.750 INCHES FIRST END IN |
| Teeth Quantity | 80 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.309 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 5 OR QUALITY NUMBER 6 |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-A-250/11,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.5000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Mounting Hole Nominal Thread Size | 0.112 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Nominal Outside Diameter | 2.561 INCHES IN |
| Mounting Hole Thread Quantity Per Inch | 40 TRANSVERSELY THROUGH HUB FIRST END |
| Surface Treatment | ANODIZE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.189 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 |
|---|---|
| 554A003492 | Northrop Grumman Systems Corporation (USA) |
| A554-56 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| 003492 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| Reference | Meaning |
|---|---|
| 554A003492 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 3020-00-753-2280 is a Gear,spur, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-753-2280 has 3 manufacturer part numbers on file: 554A003492 (Northrop Grumman Systems Corporation), A554-56 (L3 Technologies, Inc. Div L3 Keo), 003492 (L3 Technologies, Inc. Div L3 Keo).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-573-4176. Verify interchangeability with system specifications before substitution.
Key specifications for A554-56: Bore Nominal Diameter: 0.375 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.750 INCHES FIRST END IN; Teeth Quantity: 80; Body Style: PLAIN, SOLID. 22 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.