The Pulley,groove, cataloged under National Stock Number 3020-00-186-2840, 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 Richard Manufacturing Co., Inc. Dba Richard Manufacturing Co Inc. Government technical data includes 25 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-186-2840 |
| Primary Part Number | 65850-0500-043 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Richard Manufacturing Co., Inc. Dba Richard Manufacturing Co Inc |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 1.960 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.750 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Radius | 0.218 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 4.125 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Groove Depth | 0.315 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| Bearing Type | SLEEVE |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.219 INCHES NOMINAL BOTH ENDS IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.500 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Face Width | 0.605 INCHES NOMINAL IN |
| Groove Width | 0.490 INCHES NOMINAL IN |
| Lightening Hole | NOT INCLUDED |
| 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 |
|---|---|
| 65850-0500-043 | Richard Manufacturing Co., Inc. Dba Richard Manufacturing Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 65850-05005-043 | 3/9 Design control — primary reference Mohawk Fabric Co Inc Dba Mohawk Fabric Co Inc |
| 65850-05005-041 | 5/9 Secondary reference Richard Manufacturing Co., Inc. Dba Richard Manufacturing Co Inc |
| 65850-05005-041 | 5/9 Secondary reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| 65850-0500-043 | 5/9 Secondary reference Macor Inc |
| 65850-05005-043 | 5/9 Secondary reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| 65850-05005-041 | 5/9 Secondary reference Macor Inc |
| 656850-05005-043 | 5/9 Secondary reference Macor Inc |
NSN 3020-00-186-2840 is a Pulley,groove, manufactured by Richard Manufacturing Co., Inc. Dba Richard Manufacturing Co Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-186-2840 has 1 manufacturer part number on file: 65850-0500-043 (Richard Manufacturing Co., Inc. Dba Richard Manufacturing Co Inc).
Key specifications for 65850-0500-043: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 1.960 INCHES NOMINAL BOTH ENDS IN; Bore Feature: INCLUDED; Bearing Quantity: 1. 25 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.