The Gear,helical, cataloged under National Stock Number 3020-00-399-4304, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Northrop Grumman Systems Corporation Div Marine Systems. Government technical data includes 25 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 50 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-399-4304 |
| Primary Part Number | 3706 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — No Item Name Available |
| Manufacturer | Northrop Grumman Systems Corporation Div Marine Systems |
| Status | ACTIVE |
| Pitch Diameter | 22.0000 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-890,CLASS B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Attachment Method | MOUNTING HOLE |
| Nominal Distance Between Body Face and Protruding Hub End | 1.438 INCHES FIRST END IN |
| Pressure Angle | 20.0000 DEGREES |
| Mounting Hole Type and Quantity | 4 PLAIN AXIALLY THROUGH BODY FIRST END |
| Hardness Rating | 160.0 BRINELL STANDARD MINIMUM OVERALL |
| Nominal Distance Between Body Face and Recessed Hub End | 1.261 INCHES SECOND END IN |
| Body Style | WEBBED, SOLID |
| Tooth Form | STANDARD |
| Teeth Quantity | 220 |
| Face Nominal Width | 3.000 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 2.656 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 16.500 INCHES BOTH ENDS IN |
| Keyway Nominal Width | 0.750 INCHES BOTH ENDS IN |
| Bore Style | TAPERED W/KEYWAY BOTH ENDS |
| Nominal Outside Diameter | 22.167 INCHES IN |
| Style Designator | ONE PROTRUDING HUB, ONE RECESSED HUB |
| Mounting Hole Nominal Diameter | 1.000 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Tooth Direction | RIGHT |
| Hub Style Designator | PLAIN BOTH ENDS |
| Helix Angle | 11.7167 DEGREES |
| Teeth Type | SINGLE HELIX |
| Material | STEEL OVERALL |
| Taper Major Nominal Diameter | 3.500 INCHES BOTH ENDS IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 3706 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-443IPC55 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-661DPC55 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-753BPC55 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-753IPC55 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-394DPC55 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-661DPC55 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-762BPC55 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-394DPC55 | Westinghouse Electric Corp (USA) |
| D15-443IPC55 | Westinghouse Electric Corp (USA) |
| D15-393BPC55 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-661BPC55 | Westinghouse Electric Corp (USA) |
| D15-655BPC55 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-762JPC55 | Westinghouse Electric Corp (USA) |
| D15-661IPC55 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-394DPC55 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| 3706 | Westinghouse Electric Corp Sturtevant Div (USA) |
| D15-655IPC55 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-661KPC55 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| D15-655IPC55 | Westinghouse Electric Corp Sturtevant Div (USA) |
NSN 3020-00-399-4304 is a Gear,helical, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 3020 (No Item Name Available). Status: active.
NSN 3020-00-399-4304 has 50 cross-referenced part numbers: 3706 (Northrop Grumman Systems Corporation Div Marine Systems), D15-443IPC55 (Westinghouse Electric Corp Sturtevant Div), D15-661DPC55 (Westinghouse Electric Corp Sturtevant Div), D15-753BPC55 (Northrop Grumman Systems Corporation Div Marine Systems), D15-753IPC55 (Westinghouse Electric Corp Sturtevant Div) and 45 more.
There are 12 known substitutes for 3020-00-399-4304: 6105-00-167-7504, 5310-00-285-1525, 3895-00-425-1696 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3706: Pitch Diameter: 22.0000 INCHES NOMINAL IN; Material Document and Classification: MIL-S-890,CLASS B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Attachment Method: MOUNTING HOLE; Nominal Distance Between Body Face and Protruding Hub End: 1.438 INCHES FIRST END IN. 25 total characteristics are documented in the Federal Logistics Information System.