The Pulley,groove, cataloged under National Stock Number 3020-01-339-9472, 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 Ralmark Co. Government technical data includes 14 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 | 3020-01-339-9472 |
| Primary Part Number | 8-2475 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ralmark Co |
| Status | ACTIVE |
| Hub Outside Diameter | 0.768 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | NOT INCLUDED |
| Design Form | PLAIN |
| Groove Radius | 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Groove Shape | U |
| Outside Diameter | 4.120 INCHES MINIMUM AND 4.130 INCHES MAXIMUM IN |
| Style Designator | PLAIN |
| Groove Depth | 0.500 INCHES NOMINAL IN |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.153 INCHES NOMINAL BOTH ENDS IN |
| Face Width | 0.590 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN |
| Groove Width | 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM 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 |
|---|---|
| 70400-00512-104 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| 8-2475 PRIMARY | Ralmark Co (USA) |
NSN 3020-01-339-9472 is a Pulley,groove, manufactured by Ralmark Co, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-339-9472 has 2 manufacturer part numbers on file: 70400-00512-104 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), 8-2475 (Ralmark Co).
Key specifications for 8-2475: Hub Outside Diameter: 0.768 INCHES NOMINAL BOTH ENDS IN; Bore Feature: NOT INCLUDED; Design Form: PLAIN; Groove Radius: 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN. 14 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.