The Pulley,groove, cataloged under National Stock Number 3020-01-275-0640, 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 Bell-Memphis Inc. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-275-0640 |
| Primary Part Number | LS9021A1 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Bell-Memphis Inc |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.620 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Groove Radius | 0.125 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 2.620 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Pitch Diameter | 1.995 INCHES NOMINAL IN |
| Groove Depth | 0.625 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.485 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY OVERALL |
| Face Width | 0.620 INCHES NOMINAL IN |
| Groove Width | 0.140 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 |
|---|---|
| LS9021A1 PRIMARY | Bell-Memphis Inc (USA) |
| Reference | Meaning |
|---|---|
| LS9021A1 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-01-275-0640 is a Pulley,groove, manufactured by Bell-Memphis Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-275-0640 has 1 manufacturer part number on file: LS9021A1 (Bell-Memphis Inc).
Key specifications for LS9021A1: Integral Cooling Vane: NOT INCLUDED; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED; Bore Length: 0.620 INCHES NOMINAL IN. 20 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.