The Pulley,groove, cataloged under National Stock Number 3020-00-417-2480, 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 Emerson Electric Co Browning Mfg Div. Government technical data includes 24 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-417-2480 |
| Primary Part Number | BK57H & H 3/4 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Emerson Electric Co Browning Mfg Div |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 3.090 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 1.250 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Shape | V |
| Standard V-Belt Section Designation for Which Designed | 4L |
| Outside Diameter | 5.450 INCHES NOMINAL IN |
| Style Designator | WEBBED OR SPOKED |
| Pitch Diameter | 4.700 INCHES NOMINAL IN |
| Groove Depth | 0.640 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| V Groove Angle in Deg | 18.0 |
| Unable to Decode | UNABLE TO DECODE |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.750 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 0.875 INCHES NOMINAL IN |
| Groove Width | 0.656 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 |
|---|---|
| BK57H & H 3/4 PRIMARY | Emerson Electric Co Browning Mfg Div (USA) |
| Reference | Meaning |
|---|---|
| KU4-1-5 | 7/2 Vendor item drawing reference U.S. Government activity |
| BK57H | 5/9 Secondary reference Emerson Electric Co Browning Mfg Div |
| BK57H-HX3/4 | 5/9 Secondary reference Emerson Electric Co Browning Mfg Div |
| BG57D-DX3/4 | 5/9 Secondary reference Emerson Power Transmission Corporation Div Ept |
NSN 3020-00-417-2480 is a Pulley,groove, manufactured by Emerson Electric Co Browning Mfg Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-417-2480 has 1 manufacturer part number on file: BK57H & H 3/4 (Emerson Electric Co Browning Mfg Div).
Key specifications for BK57H & H 3/4: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 3.090 INCHES NOMINAL BOTH ENDS IN; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED. 24 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.