The Gear,spur, cataloged under National Stock Number 3020-00-171-3196, 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 24 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-171-3196 |
| Primary Part Number | 65850-05134-101 |
| 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 | 1.900 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 2.375 INCHES FIRST END IN |
| Hub Nominal Diameter | 2.375 INCHES SECOND END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.100 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Recessed Hub End | 0.140 INCHES SECOND END IN |
| Teeth Quantity | 43 |
| Surface Treatment Document and Classification | MIL-F-495 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | WEBBED, SOLID |
| Counterbore Nominal Diameter | 2.234 INCHES SECOND END IN |
| Bore Style | W/COUNTERBORE BOTH ENDS |
| Precision Classification | QUALITY NUMBER 10 OR QUALITY NUMBER 11 |
| Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | RECESSED HUBS |
| Material Document and Classification | MIL-S-5000,COND C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 3.0714 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 3.193 INCHES IN |
| Surface Treatment | OXIDE OVERALL |
| Test Data Document | 81349-MIL-I-6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Pressure Angle | 25.0000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Counterbore Nominal Depth | 0.620 INCHES SECOND END IN |
| Face Nominal Width | 0.920 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 |
|---|---|
| 65850-05134-101 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 65850-05134-101 | Triumph Gear Systems - Macomb, Inc (USA) |
| 65850-05134-101 | B. & R. Machine & Tool Corp (USA) |
| Reference | Meaning |
|---|---|
| 65850-05134-101 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-00-171-3196 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 3020-00-171-3196 has 3 manufacturer part numbers on file: 65850-05134-101 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 65850-05134-101 (Triumph Gear Systems - Macomb, Inc), 65850-05134-101 (B. & R. Machine & Tool Corp).
Key specifications for 65850-05134-101: Bore Nominal Diameter: 1.900 INCHES BOTH ENDS IN; Hub Nominal Diameter: 2.375 INCHES FIRST END IN; Hub Nominal Diameter: 2.375 INCHES SECOND END IN; Nominal Distance Between Body Face and Recessed Hub End: 0.100 INCHES FIRST END IN. 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.