The Gear,helical, cataloged under National Stock Number 3020-01-469-6689, 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 25 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-469-6689 |
| Primary Part Number | 5939108 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.4995 INCHES BOTH ENDS IN |
| Helix Angle | 20.364108 DEGREES |
| Hub Nominal Diameter | 0.688 INCHES FIRST END IN |
| Teeth Quantity | 26 |
| Surface Treatment Document and Classification | MIL-C-13924, CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 PLAIN TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.319 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 |
| Mounting Hole Nominal Diameter | 0.093 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.5 ROCKWELL SUPERFICIAL 15-N MAXIMUM TEETH |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | MIL-S-8690, AISI 8620 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS 6260, SAE 9310 MIL STD SINGLE MATERIAL RESPONSE OR ASTM A304, GR 9310H NATIONAL SPEC SINGLE MATERIAL RESPONSE OR AMS 6265 MIL STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.8666 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PINNED FIRST END |
| Nominal Outside Diameter | 0.928 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 8620 OR STEEL COMP E9310 OR STEEL COMP 9310H OVERALL |
| Attachment Method | MOUNTING HOLE AND SETSCREWS |
| Face Nominal Width | 0.438 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5939108 PRIMARY | Naval Sea Systems Command (USA) |
NSN 3020-01-469-6689 is a Gear,helical, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-469-6689 has 1 manufacturer part number on file: 5939108 (Naval Sea Systems Command).
Key specifications for 5939108: Bore Nominal Diameter: 0.4995 INCHES BOTH ENDS IN; Helix Angle: 20.364108 DEGREES; Hub Nominal Diameter: 0.688 INCHES FIRST END IN; Teeth Quantity: 26. 25 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.
NSN 3020-01-469-6689 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.