The Gear,helical, cataloged under National Stock Number 3020-00-141-8937, 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 Bay City Shovels, Inc. Government technical data includes 24 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 | 3020-00-141-8937 |
| Primary Part Number | H2662B4820 |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Bay City Shovels, Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 2.982 INCHES BOTH ENDS IN |
| Helix Angle | 11.2500 DEGREES |
| Hub Nominal Diameter | 4.250 INCHES SECOND END IN |
| Teeth Quantity | 35 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | INVOLUTE SPLINE BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.891 INCHES FIRST END IN |
| First Step Nominal Length | 0.828 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Pitch Diameter | 11.8950 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 4.250 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Spline Quantity | 20 BOTH ENDS |
| End Nominal Length | 1.063 INCHES FIRST END IN |
| Nominal Outside Diameter | 12.5610 INCHES IN |
| End Nominal Diameter | 3.438 INCHES FIRST END IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 2.500 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 |
|---|---|
| H2662B4820 PRIMARY | Bay City Shovels, Inc (USA) |
NSN 3020-00-141-8937 is a Gear,helical, manufactured by Bay City Shovels, Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-141-8937 has 1 manufacturer part number on file: H2662B4820 (Bay City Shovels, Inc).
Key specifications for H2662B4820: Bore Nominal Diameter: 2.982 INCHES BOTH ENDS IN; Helix Angle: 11.2500 DEGREES; Hub Nominal Diameter: 4.250 INCHES SECOND END IN; Teeth Quantity: 35. 24 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.