The Gear,helical, cataloged under National Stock Number 3020-01-414-7961, 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 Skf Usa Inc.. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-414-7961 |
| Primary Part Number | 845-6603150 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Skf Usa Inc. |
| Status | ACTIVE |
| Keyway Nominal Width | 0.375 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.576 INCHES BOTH ENDS IN |
| Helix Angle | 14.9166 DEGREES |
| Hub Nominal Diameter | 2.130 INCHES SECOND END IN |
| Teeth Quantity | 38 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | LEFT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.141 INCHES SECOND END IN |
| Precision Classification | ACCURACY GRADE 8 |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 52.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM BODY |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | ASTM A304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.7314 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 3.926 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.956 INCHES BOTH ENDS IN |
| Surface Treatment | CARBON OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4320H OVERALL |
| Face Nominal Width | 1.703 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 |
|---|---|
| 845-6603141-72 | Naval Sea Systems Command (USA) |
| 845-6603150 PRIMARY | Skf Usa Inc. (USA) |
| Reference | Meaning |
|---|---|
| 6603150 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-414-7961 is a Gear,helical, manufactured by Skf Usa Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-414-7961 has 2 manufacturer part numbers on file: 845-6603141-72 (Naval Sea Systems Command), 845-6603150 (Skf Usa Inc.).
Key specifications for 845-6603150: Keyway Nominal Width: 0.375 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.576 INCHES BOTH ENDS IN; Helix Angle: 14.9166 DEGREES; Hub Nominal Diameter: 2.130 INCHES SECOND END IN. 23 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.