The Pulley,groove, cataloged under National Stock Number 3020-01-106-1871, 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 30 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-106-1871 |
| Primary Part Number | 9N3899 |
| 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 | 0.746 INCHES NOMINAL AA END IN |
| Hub Outside Diameter | 1.378 INCHES NOMINAL BB END IN |
| Bore Feature | INCLUDED |
| Securing Method | THREADED HOLE(S) |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.929 INCHES NOMINAL IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Shape | V |
| Outside Diameter | 5.500 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Groove Depth | 0.592 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Counterbore Depth | 0.125 INCHES NOMINAL AND 0.047 INCHES NOMINAL IN |
| Groove Quantity | 3 |
| Counterbore Location | BOTH ENDS |
| V Groove Angle in Deg | 36.0 |
| Counterbore Diameter | 0.687 INCHES NOMINAL AND 0.985 INCHES NOMINAL IN |
| Securing Hole Quantity | 4 |
| Bolt Circle Diameter | 2.750 INCHES NOMINAL IN |
| Thread Size | 5/16-18 |
| Unable to Decode | UNABLE TO DECODE AND UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 1.189 INCHES NOMINAL BB END IN |
| Hole Location | THRU PULLEY SURFACE |
| Counterbore Feature | INCLUDED |
| Bore Diameter | 0.480 INCHES NOMINAL IN |
| Material | IRON OVERALL |
| Face Width | 2.118 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 |
|---|---|
| 6CA942 | Oshkosh Defense Llc (USA) |
| 9N3899 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 9N3899 | Caterpillar Tractor Co Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 6CA942 | 5/9 Secondary reference Oshkosh Corp |
| IPD9N3899 | 5/9 Secondary reference Industrial Parts Depot, Llc Dba Ipd |
NSN 3020-01-106-1871 is a Pulley,groove, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-106-1871 has 3 manufacturer part numbers on file: 6CA942 (Oshkosh Defense Llc), 9N3899 (Caterpillar Inc Div Caterpillar Defense), 9N3899 (Caterpillar Tractor Co Ltd).
Key specifications for 9N3899: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 0.746 INCHES NOMINAL AA END IN; Hub Outside Diameter: 1.378 INCHES NOMINAL BB END IN; Bore Feature: INCLUDED. 30 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.