The Pulley,groove, cataloged under National Stock Number 3020-00-435-4586, 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 Us Army Aviation and Missile Command. Government technical data includes 29 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 | 3020-00-435-4586 |
| Primary Part Number | 8171781 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 5.983 INCHES NOMINAL AA END IN |
| Bore Feature | INCLUDED |
| Securing Method | THREADED HOLE(S) |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 2.188 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Radius | 0.625 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 9.500 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Groove Depth | 1.250 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| Protruding Hub Characteristic | PLAIN |
| Securing Hole Quantity | 4 AND 2 |
| Bolt Circle Diameter | 6.500 INCHES NOMINAL IN |
| Thread Size | 3/8-16 AND .164-32 |
| Unable to Decode | UNABLE TO DECODE |
| Surface Treatment | DICHROMATE AND ENAMEL |
| Distance From Outside Flange/rim to Hub End and Location | 0.563 INCHES NOMINAL AA END AND 0.593 INCHES NOMINAL BB END IN |
| Hole Location | 5/16 IN. FROM HUB END;TWO THROUGH PULLEY SURFACE IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 5.035 INCHES NOMINAL IN |
| Material | MAGNESIUM ALLOY OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 1.625 INCHES NOMINAL 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 |
|---|---|
| 8171781 PRIMARY | Us Army Aviation and Missile Command (USA) |
NSN 3020-00-435-4586 is a Pulley,groove, manufactured by Us Army Aviation and Missile Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-435-4586 has 1 manufacturer part number on file: 8171781 (Us Army Aviation and Missile Command).
Key specifications for 8171781: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 5.983 INCHES NOMINAL AA END IN; Bore Feature: INCLUDED; Securing Method: THREADED HOLE(S). 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.
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.