The Gear,spur, cataloged under National Stock Number 3020-01-321-8414, 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 Naval Sea Systems Command. Government technical data includes 19 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-321-8414 |
| Primary Part Number | 5544171 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.631 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.750 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.870 INCHES FIRST END IN |
| Teeth Quantity | 42 |
| Body Style | WEBBED, OFFSET, SOLID |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.122 INCHES FIRST END IN |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Material Document and Classification | AMS 5659 OR 5862 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.1637 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 18 BOTH ENDS |
| Nominal Outside Diameter | 3.301 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Spline Pitch Diameter | 0.5625 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 0.250 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 |
NSN 3020-01-321-8414 is a Gear,spur, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-321-8414 has 2 manufacturer part numbers on file: 5544171 (Naval Sea Systems Command), 5544171 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 5544171: Bore Nominal Diameter: 0.631 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.750 INCHES SECOND END IN; Hub Nominal Diameter: 0.870 INCHES FIRST END IN; Teeth Quantity: 42. 19 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.