The Gear,spur, cataloged under National Stock Number 3020-00-001-6557, 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 26 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-001-6557 |
| Primary Part Number | 65351-11176-102 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.650 INCHES FIRST END IN |
| Bore Nominal Diameter | 0.650 INCHES COUNTER BORE SECOND END IN |
| Teeth Quantity | 57 |
| Surface Treatment Document and Classification | SS8416 CAGE78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Counterbore Nominal Diameter | 0.740 INCHES COUNTER BORE SECOND END IN |
| Bore Style | W/COUNTERBORE COUNTER BORE SECOND END |
| Bore Style | INVOLUTE SPLINE FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 1.125 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 2.135 INCHES FIRST END IN |
| First Step Nominal Length | 0.797 INCHES SECOND END IN |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | AMS 6260 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.7000 INCHES NOMINAL IN |
| First Step Nominal Diameter | 0.937 INCHES SECOND END IN |
| Hub Style Designator | 1 STEP SECOND END |
| Spline Quantity | 61 FIRST END |
| End Nominal Length | 1.125 INCHES SECOND END IN |
| Nominal Outside Diameter | 5.898 INCHES IN |
| Surface Treatment | PHOSPHATE OVERALL |
| End Nominal Diameter | 0.875 INCHES SECOND END IN |
| Pressure Angle | 22.5000 DEGREES |
| Material | STEEL COMP E9310 OVERALL |
| Counterbore Nominal Depth | 0.387 INCHES COUNTER BORE SECOND END IN |
| Spline Pitch Diameter | 0.6000 INCHES NOMINAL FIRST END IN |
| 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 |
|---|---|
| 65351-11176-102 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 65351-11176-102 | Precision Gear Industries Llc (USA) |
NSN 3020-00-001-6557 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 3020-00-001-6557 has 2 manufacturer part numbers on file: 65351-11176-102 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 65351-11176-102 (Precision Gear Industries Llc).
Key specifications for 65351-11176-102: Bore Nominal Diameter: 0.650 INCHES FIRST END IN; Bore Nominal Diameter: 0.650 INCHES COUNTER BORE SECOND END IN; Teeth Quantity: 57; Surface Treatment Document and Classification: SS8416 CAGE78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 26 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.