The Gear,worm Wheel, cataloged under National Stock Number 3020-00-338-9581, 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 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through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-338-9581 |
| Primary Part Number | CVBS4501-20PC101 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Keyway Nominal Width | 0.437 INCHES BOTH ENDS IN |
| Helix Angle | 32.4499 DEGREES |
| Hub Nominal Diameter | 3.125 INCHES SECOND END IN |
| Hub Nominal Diameter | 0.250 INCHES FIRST END IN |
| Teeth Quantity | 29 |
| Body Style | WEBBED, OFFSET, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | TAPERED W/KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.500 INCHES BOTH ENDS IN |
| Throat Nominal Radius | 1.003 INCHES IN |
| Face Type | CONCAVE |
| Style Designator | PROTRUDING HUBS |
| Taper Major Nominal Diameter | 1.875 INCHES BOTH ENDS IN |
| Pitch Diameter | 13.5580 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 14.750 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.160 INCHES BOTH ENDS IN |
| Pressure Angle | 27.5000 DEGREES |
| Material | COPPER ALLOY OVERALL |
| Mating Thread Lead Quantity | 4 |
| Face Nominal Width | 2.000 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 |
|---|---|
| CVBS4501-20PC101 PRIMARY | Naval Sea Systems Command (USA) |
| CB1S4501-12PC101 PRIMARY | Naval Sea Systems Command (USA) |
| CB1S4501-8PC101 PRIMARY | Naval Sea Systems Command (USA) |
| CVB41S4501-16PC101 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| W50CS3X1 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| G7899PC101 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| W50CS3X1 | 5/9 Secondary reference Siemens Energy, Inc. |
| G7895PC101 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| CB1S4501-8PC101 | 5/9 Secondary reference U.S. Government activity |
| G9818PC101 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| CVB41S4501-16PC101 | 5/9 Secondary reference U.S. Government activity |
| CB1S4501-12PC101 | 5/9 Secondary reference U.S. Government activity |
| G7899PC101 | 5/9 Secondary reference Siemens Energy, Inc. |
| G7895PC101 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9818PC101 | 5/9 Secondary reference Siemens Energy, Inc. |
| G9822PC101 | 5/9 Secondary reference Siemens Energy, Inc. |
| CVBS4501-20PC101 | 5/9 Secondary reference U.S. Government activity |
| G9822PC101 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
NSN 3020-00-338-9581 is a Gear,worm Wheel, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-338-9581 has 4 manufacturer part numbers on file: CVBS4501-20PC101 (Naval Sea Systems Command), CB1S4501-12PC101 (Naval Sea Systems Command), CB1S4501-8PC101 (Naval Sea Systems Command), CVB41S4501-16PC101 (Naval Sea Systems Command).
Key specifications for CVBS4501-20PC101: Keyway Nominal Width: 0.437 INCHES BOTH ENDS IN; Helix Angle: 32.4499 DEGREES; Hub Nominal Diameter: 3.125 INCHES SECOND END IN; Hub Nominal Diameter: 0.250 INCHES FIRST 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.