The Gear,worm Wheel, cataloged under National Stock Number 3020-01-414-7960, 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 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-414-7960 |
| Primary Part Number | 845-6556500 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 5.900 INCHES BOTH ENDS IN |
| Helix Angle | 4.5000 DEGREES |
| Teeth Quantity | 40 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | LEFT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Throat Nominal Radius | 0.990 INCHES IN |
| Face Type | CONCAVE |
| Hardness Rating | 175.0 BRINELL HULTGREN MINIMUM AND 250.0 BRINELL HULTGREN MAXIMUM OVERALL |
| Style Designator | HUBLESS |
| Material Document and Classification | ASTM D271 ASSN STD 1ST MATERIAL RESPONSE AND ASTM B148 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 7.2500 INCHES NOMINAL IN |
| Spline Quantity | 60 BOTH ENDS |
| Nominal Outside Diameter | 7.794 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM AND BRONZE OVERALL |
| Spline Pitch Diameter | 6.0000 INCHES NOMINAL BOTH ENDS IN |
| Face Nominal Width | 1.842 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 |
|---|---|
| 845-6603141-51 | Naval Sea Systems Command (USA) |
| 845-6556500 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6556500 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-414-7960 is a Gear,worm Wheel, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-414-7960 has 2 manufacturer part numbers on file: 845-6603141-51 (Naval Sea Systems Command), 845-6556500 (Naval Sea Systems Command).
Key specifications for 845-6556500: Bore Nominal Diameter: 5.900 INCHES BOTH ENDS IN; Helix Angle: 4.5000 DEGREES; Teeth Quantity: 40; Body Style: PLAIN, SOLID. 18 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.