The Gear,spur, cataloged under National Stock Number 3020-01-004-0845, 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 Northrop Grumman Systems Corporation. Government technical data includes 26 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-004-0845 |
| Primary Part Number | 1801617 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.500 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 1.500 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.750 INCHES FIRST END IN |
| Backlash Designation | GRADE E |
| Teeth Quantity | 122 |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 3 THREADED TRANSVERSELY THROUGH FACE |
| Nominal Distance Between Body Face and Protruding Hub End | 0.063 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.188 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 9 |
| Nominal Overall Length | 0.375 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Pitch Diameter | 2.5417 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Mounting Hole Nominal Thread Size | 0.112 INCHES TRANSVERSELY THROUGH FACE IN |
| Nominal Outside Diameter | 2.583 INCHES IN |
| Mounting Hole Thread Quantity Per Inch | 40 TRANSVERSELY THROUGH FACE |
| Surface Treatment | ANODIZE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH FACE |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.125 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 |
|---|---|
| 1801617 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 3020-01-004-0845 is a Gear,spur, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-004-0845 has 1 manufacturer part number on file: 1801617 (Northrop Grumman Systems Corporation).
Key specifications for 1801617: Bore Nominal Diameter: 0.500 INCHES BOTH ENDS IN; Hub Nominal Diameter: 1.500 INCHES SECOND END IN; Hub Nominal Diameter: 0.750 INCHES FIRST END IN; Backlash Designation: GRADE E. 26 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.