The Gear,spur, cataloged under National Stock Number 3020-00-411-4201, 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 Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 14 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 | 3020-00-411-4201 |
| Primary Part Number | 11838509 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.693 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.185 INCHES FIRST END IN |
| Teeth Quantity | 48 |
| Body Style | SPOKED, OFFSET |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.347 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | MIL-S-8159 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 4.1719 INCHES MINIMUM AND 4.1739 INCHES MAXIMUM IN |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 4.330 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Nominal Width | 0.288 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 |
|---|---|
| 11838509 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 3020-00-411-4201 is a Gear,spur, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-411-4201 has 1 manufacturer part number on file: 11838509 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 11838509: Bore Nominal Diameter: 1.693 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.185 INCHES FIRST END IN; Teeth Quantity: 48; Body Style: SPOKED, OFFSET. 14 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.