The Gear,helical, cataloged under National Stock Number 3020-00-239-5520, 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 Siemens Energy, Inc.. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-239-5520 |
| Primary Part Number | G7667PC93 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| Keyway Nominal Width | 0.187 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.003 INCHES BOTH ENDS IN |
| Helix Angle | 45.9761 DEGREES |
| Hub Nominal Diameter | 1.750 INCHES SECOND END IN |
| Hub Nominal Diameter | 1.750 INCHES FIRST END IN |
| Teeth Quantity | 67 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.219 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Material Document and Classification | MIL-S-890,CLASS AN MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.0367 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 5.1367 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.5938 INCHES BOTH ENDS IN |
| Pressure Angle | 15.0000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.750 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 |
|---|---|
| G7667PC93 PRIMARY | Siemens Energy, Inc. (USA) |
| G6661PC93 PRIMARY | Siemens Energy, Inc. (USA) |
| G7673PC93 PRIMARY | Siemens Energy, Inc. (USA) |
| G6656PC93 PRIMARY | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| W416BBS1X1 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| W416BBS1X1 | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 3020-00-239-5520 is a Gear,helical, manufactured by Siemens Energy, Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-239-5520 has 4 manufacturer part numbers on file: G7667PC93 (Siemens Energy, Inc.), G6661PC93 (Siemens Energy, Inc.), G7673PC93 (Siemens Energy, Inc.), G6656PC93 (Siemens Energy, Inc.).
Key specifications for G7667PC93: Keyway Nominal Width: 0.187 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.003 INCHES BOTH ENDS IN; Helix Angle: 45.9761 DEGREES; Hub Nominal Diameter: 1.750 INCHES SECOND END IN. 21 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.