The Gear,helical, cataloged under National Stock Number 3020-00-481-9590, 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 Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer. Government technical data includes 20 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 | 3020-00-481-9590 |
| Primary Part Number | 919935 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer |
| Status | ACTIVE |
| Keyway Nominal Width | 0.376 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.751 INCHES BOTH ENDS IN |
| Helix Angle | 25.0000 DEGREES |
| Hub Nominal Diameter | 2.750 INCHES FIRST END IN |
| Hub Nominal Diameter | 2.750 INCHES SECOND END IN |
| Teeth Quantity | 122 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 77.0 ROCKWELL A MINIMUM TEETH |
| Style Designator | FLUSH HUB |
| Pitch Diameter | 8.4310 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 8.536 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.057 INCHES BOTH ENDS IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 0.938 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 |
|---|---|
| 919935 PRIMARY | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA) |
NSN 3020-00-481-9590 is a Gear,helical, manufactured by Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-481-9590 has 1 manufacturer part number on file: 919935 (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer).
Key specifications for 919935: Keyway Nominal Width: 0.376 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.751 INCHES BOTH ENDS IN; Helix Angle: 25.0000 DEGREES; Hub Nominal Diameter: 2.750 INCHES FIRST END IN. 20 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.