The Pulley,groove, cataloged under National Stock Number 3020-00-959-3603, 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 Caterpillar Inc Div Caterpillar Defense. 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 | 3020-00-959-3603 |
| Primary Part Number | 3R2726 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 4.620 INCHES NOMINAL AA END IN |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.440 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | OFFSET |
| Groove Shape | V |
| Outside Diameter | 11.500 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 10.220 INCHES NOMINAL IN |
| Groove Depth | 1.530 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Counterbore Depth | 1.132 INCHES NOMINAL IN |
| Groove Quantity | 3 |
| Counterbore Location | BB END |
| V Groove Angle in Deg | 38.0 |
| Protruding Hub Characteristic | PLAIN |
| Counterbore Diameter | 3.969 INCHES NOMINAL IN |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.440 INCHES NOMINAL AA END AND 1.840 INCHES MAXIMUM BB END IN |
| Counterbore Feature | INCLUDED |
| Bore Diameter | 2.250 INCHES NOMINAL IN |
| Material | IRON CAST OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 3.125 INCHES NOMINAL IN |
| Groove Width | 0.878 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 |
|---|---|
| 3R2726 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 3020-00-959-3603 is a Pulley,groove, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-959-3603 has 1 manufacturer part number on file: 3R2726 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 3R2726: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 4.620 INCHES NOMINAL AA END IN; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED. 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.