The Gear,helical, cataloged under National Stock Number 3020-01-294-9922, 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 Raytheon Company. Government technical data includes 29 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 | 3020-01-294-9922 |
| Primary Part Number | 5187131 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Raytheon Company |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.257 INCHES FIRST END IN |
| Helix Angle | 20.0000 DEGREES |
| Hub Nominal Diameter | 0.3748 INCHES BOTH ENDS IN |
| Teeth Quantity | 21 |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PARTIAL FIRST END |
| Mounting Hole Type and Quantity | 2 PLAIN TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.240 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.500 INCHES FIRST END IN |
| Mounting Hole Nominal Diameter | 0.0935 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | PROTRUDING HUBS |
| Bore Nominal Depth | 1.000 INCHES FIRST END IN |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.4656 INCHES NOMINAL IN |
| Hub Style Designator | 1 GROOVE BOTH ENDS |
| Nominal Outside Diameter | 0.5072 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nominal Distance From End to First Groove | 0.440 INCHES FIRST END IN |
| Nominal Distance From End to First Groove | 0.210 INCHES SECOND END IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 416 OVERALL |
| First Groove Nominal Diameter | 0.2548 INCHES SECOND END IN |
| First Groove Nominal Diameter | 0.3348 INCHES FIRST END IN |
| First Groove Nominal Width | 0.030 INCHES SECOND END IN |
| First Groove Nominal Width | 0.060 INCHES FIRST END IN |
| Attachment Method | MOUNTING HOLE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3020-01-294-9922 is a Gear,helical, manufactured by Raytheon Company, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-294-9922 has 2 manufacturer part numbers on file: 5187131 (Naval Sea Systems Command), 5187131 (Raytheon Company).
Key specifications for 5187131: Bore Nominal Diameter: 0.257 INCHES FIRST END IN; Helix Angle: 20.0000 DEGREES; Hub Nominal Diameter: 0.3748 INCHES BOTH ENDS IN; Teeth Quantity: 21. 29 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.