The Chain,leaf, cataloged under National Stock Number 3020-01-412-1128, 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 The Entwistle Company Llc. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-01-412-1128 |
| Primary Part Number | 8909-310-002 |
| Item Name | Chain,leaf |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Link Plate Nominal Thickness | 0.0940 INCHES IN |
| Link Style | 3 X 4 |
| Link Nominal Width | 0.6580 INCHES IN |
| Link Pin Nominal Diameter | 0.2340 INCHES IN |
| Effective Length | 9.4271 FEET NOMINAL FT |
| Nominal Pitch Distance | 0.625 INCHES IN |
| Link Row Quantity | 1 |
| Material | STEEL |
| Link Plate Width | 0.594 INCHES NOMINAL 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 |
|---|---|
| 8909-310-002 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| BL534-181 PITCHES | 5/9 Secondary reference Rexnord Industries Inc. Div Roller Chain Operation |
NSN 3020-01-412-1128 is a Chain,leaf, manufactured by The Entwistle Company Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-412-1128 has 1 manufacturer part number on file: 8909-310-002 (The Entwistle Company Llc).
Key specifications for 8909-310-002: Link Plate Nominal Thickness: 0.0940 INCHES IN; Link Style: 3 X 4; Link Nominal Width: 0.6580 INCHES IN; Link Pin Nominal Diameter: 0.2340 INCHES IN. 9 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.