The Gear,spur, cataloged under National Stock Number 3020-00-985-2728, 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 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 17 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 | 3020-00-985-2728 |
| Primary Part Number | 6435-20103-100 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Hub Nominal Diameter | 1.000 INCHES SECOND END IN |
| Hub Nominal Diameter | 1.000 INCHES FIRST END IN |
| Teeth Quantity | 140 |
| Surface Treatment Document and Classification | MIL-C-13924,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Nominal Distance Between Body Face and Protruding Hub End | 0.250 INCHES FIRST END IN |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 0.500 INCHES IN |
| Style Designator | ONE PROTRUDING HUB, ONE FLUSH HUB |
| Material Document and Classification | AMS 6260 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 8.7500 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Spline Quantity | 11 BOTH ENDS |
| Surface Treatment | OXIDE OVERALL |
| Pressure Angle | 22.5000 DEGREES |
| Material | STEEL COMP E9310 OVERALL |
| Face Nominal Width | 0.250 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 |
|---|---|
| 6435-20103-100 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 3020-00-985-2728 is a Gear,spur, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-985-2728 has 1 manufacturer part number on file: 6435-20103-100 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 6435-20103-100: Hub Nominal Diameter: 1.000 INCHES SECOND END IN; Hub Nominal Diameter: 1.000 INCHES FIRST END IN; Teeth Quantity: 140; Surface Treatment Document and Classification: MIL-C-13924,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 17 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.