The Sprocket Wheel, cataloged under National Stock Number 3020-00-173-7384, 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 29 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 | 3020-00-173-7384 |
| Primary Part Number | 65850-05153-101 |
| Item Name | Sprocket Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Spline Minor Diameter | 0.550 INCHES MINIMUM AND 0.550 INCHES MINIMUM AND 0.555 INCHES MAXIMUM0.555 INCHES MAXIMUM IN |
| Hub Outside Diameter | 0.885 INCHES NOMINAL AA END IN |
| First Step Diameter | 1.560 INCHES NOMINAL AA END IN |
| Design Form | PLAIN |
| Teeth Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Tooth Pitch | 0.250 INCHES NOMINAL IN |
| Asa Standard Chain Number | 25 |
| Outside Diameter | 3.008 INCHES NOMINAL3.008 INCHES NOMINAL IN |
| Spline Length | 0.450 INCHES NOMINAL IN |
| Second Step Length | 0.170 INCHES NOMINAL AA END IN |
| Style Designator | PLAIN |
| Metallic Hardness Rating and Location | 34.0 ROCKWELL C MINIMUM HUB AND 36.0 ROCKWELL C MAXIMUM HUB |
| Material Document and Classification | MIL-S-5000, COMP 4340, COND C1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Pitch Diameter | 2.869 INCHES NOMINAL IN |
| Spline Major Diameter | 0.690 INCHES MINIMUM AND 0.690 INCHES MINIMUM AND 0.700 INCHES MAXIMUM0.700 INCHES MAXIMUM IN |
| Bore Type | INVOLUTE SPLINE |
| Counterbore Depth | 0.400 INCHES MINIMUM AND 0.400 INCHES MINIMUM AND 0.170 INCHES MAXIMUM0.170 INCHES MAXIMUM IN |
| Teeth Row Quantity | 1 |
| Teeth Quantity Per Row | 36 |
| Counterbore Location | BOTH ENDS |
| Spline Pressure Angle in Deg | 30.0 |
| Protruding Hub Characteristic | STEPPED |
| Hardness Rating Test Method | ROCKWELL |
| Spline Quantity | 12 |
| Counterbore Diameter | 0.725 INCHES MINIMUM AND 0.725 INCHES MINIMUM AND 1.250 INCHES MAXIMUM1.250 INCHES MAXIMUM IN |
| First Step Length | 0.740 INCHES NOMINAL AA END IN |
| Surface Treatment | PHOSPHATE |
| Material | STEEL COMP E4340 |
| Furnished Items | COUNTERBORECOUNTERBORE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 65850-05153 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 65850-05153-101 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 3020-00-173-7384 is a Sprocket Wheel, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-173-7384 has 2 manufacturer part numbers on file: 65850-05153 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 65850-05153-101 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 65850-05153-101: Spline Minor Diameter: 0.550 INCHES MINIMUM AND 0.550 INCHES MINIMUM AND 0.555 INCHES MAXIMUM0.555 INCHES MAXIMUM IN; Hub Outside Diameter: 0.885 INCHES NOMINAL AA END IN; First Step Diameter: 1.560 INCHES NOMINAL AA END IN; Design Form: PLAIN. 29 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.
NSN 3020-00-173-7384 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.