The Gear,helical, cataloged under National Stock Number 3020-00-274-6594, 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 Fairbanks Morse, Llc. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-274-6594 |
| Primary Part Number | AFB3510B |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.4990 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 2.008 INCHES BOTH ENDS IN |
| Helix Angle | 16.0000 DEGREES |
| Hub Nominal Diameter | 3.000 INCHES SECOND END IN |
| Hub Nominal Diameter | 3.000 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.375 INCHES SECOND END IN |
| Teeth Quantity | 55 |
| Body Style | WEBBED, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Hardness Rating | 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | ONE PROTRUDING HUB, ONE RECESSED HUB |
| Material Document and Classification | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 8.1740 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 8.2840 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.2036 INCHES BOTH ENDS IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Face Nominal Width | 1.875 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 |
|---|---|
| AFB3510B PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| AFB3510B | 3/9 Design control — primary reference U.S. Government activity |
NSN 3020-00-274-6594 is a Gear,helical, manufactured by Fairbanks Morse, Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-274-6594 has 1 manufacturer part number on file: AFB3510B (Fairbanks Morse, Llc).
Key specifications for AFB3510B: Keyway Nominal Width: 0.4990 INCHES BOTH ENDS IN; Bore Nominal Diameter: 2.008 INCHES BOTH ENDS IN; Helix Angle: 16.0000 DEGREES; Hub Nominal Diameter: 3.000 INCHES SECOND END IN. 23 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.