The Pulley,groove, cataloged under National Stock Number 3020-01-106-4682, 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 28 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-106-4682 |
| Primary Part Number | N1208-1 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ralmark Co |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 0.390 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.479 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN |
| Design Form | WEBBED |
| Web/spoke Relationship to Face Centerline | NOT OFFSET |
| Groove Radius | 0.063 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN |
| Groove Shape | U |
| Outside Diameter | 3.245 INCHES MINIMUM AND 3.255 INCHES MAXIMUM IN |
| Style Designator | WEBBED OR SPOKED |
| Material Document and Classification | MIL-P-7034,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Groove Depth | 0.250 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| Protruding Hub Characteristic | PLAIN |
| Bearing Type | BALL |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 0.031 INCHES NOMINAL BOTH ENDS IN |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.250 INCHES NOMINAL IN |
| Material | PLASTIC PHENOLIC OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 0.420 INCHES NOMINAL IN |
| Groove Width | 0.220 INCHES MINIMUM AND 0.240 INCHES MAXIMUM 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 |
|---|---|
| N1208-1 PRIMARY | Ralmark Co (USA) |
| 1975-8-13 PRIMARY | Arvan, Inc. Dba Aerospace Division (USA) |
| Reference | Meaning |
|---|---|
| 3020PL1759019 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 3020PL1060297 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| C7944-1 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-106-4682 is a Pulley,groove, manufactured by Ralmark Co, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-106-4682 has 2 manufacturer part numbers on file: N1208-1 (Ralmark Co), 1975-8-13 (Arvan, Inc. Dba Aerospace Division).
Key specifications for N1208-1: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 0.390 INCHES NOMINAL BOTH ENDS IN; Bore Feature: INCLUDED; Bearing Quantity: 1. 28 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.