The Pulley,groove, cataloged under National Stock Number 3020-01-282-7101, 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 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-282-7101 |
| Primary Part Number | R219-2863-4 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Ralmark Co |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.367 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Radius | 0.075 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 2.625 INCHES NOMINAL IN |
| Shaft Size for Which Designed | 0.250 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 2.245 INCHES NOMINAL IN |
| Groove Depth | 0.160 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| Bearing Type | BEARING ROLLER |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 1.062 INCHES NOMINAL IN |
| Material | PLASTIC PHENOLIC OVERALL |
| Face Width | 0.366 INCHES NOMINAL IN |
| Groove Width | 0.197 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 |
|---|---|
| R219-2863-4 PRIMARY | Ralmark Co (USA) |
| Reference | Meaning |
|---|---|
| BM20219-4LP | 5/9 Secondary reference Bell-Memphis Inc |
NSN 3020-01-282-7101 is a Pulley,groove, manufactured by Ralmark Co, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-282-7101 has 1 manufacturer part number on file: R219-2863-4 (Ralmark Co).
Key specifications for R219-2863-4: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Bearing Quantity: 1; Split Hub Feature: NOT INCLUDED. 23 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.