The Link,roller Chain, cataloged under National Stock Number 3020-00-239-8225, 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 Union Chain Div of Ust Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-239-8225 |
| Primary Part Number | 50-40L |
| Item Name | Link,roller Chain |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Union Chain Div of Ust Inc |
| Status | ACTIVE |
| Link Plate Nominal Thickness | 0.0800 INCHES IN |
| Link Plate Width at Pin End | 0.512 INCHES NOMINAL IN |
| Link Style | ROLLER, TAPERED EDGE |
| Link Plate Width at Bushing End | 0.594 INCHES NOMINAL IN |
| Link Pin Nominal Diameter | 0.2000 INCHES IN |
| Link Roller Nominal Diameter | 0.4000 INCHES IN |
| Nominal Pitch Distance | 0.625 INCHES IN |
| Pin Fastening Method | RIVETED |
| Minimum Tensile Strength | 19520 POUNDS PER SQUARE INCH LBS |
| Link Row Quantity | 4 |
| Material | STEEL |
| Link Nominal Width Between Plates | 0.3750 INCHES 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 |
|---|---|
| 50-4-0L | Jeffrey Chain L.p. (USA) |
| 50-40L | Altra Industrial Motion Corp. (USA) |
| 50-40L PRIMARY | Union Chain Div of Ust Inc (USA) |
| ASA50-4-0L PRIMARY | Diamond Chain Co Div of Amsted Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| RC50-4-0L | 5/9 Secondary reference Fmc Corp Link-Belt Div |
| ASA50-4-0L | 3/2 Design control — primary reference U.S. Government activity |
| 50-4 0/S C/L | 3/9 Design control — primary reference Emerson Electric Co Browning Mfg Div |
| 50-4-0L | 5/9 Secondary reference U.S. Government activity |
| ASA50-4-0L | 5/2 Secondary reference U.S. Government activity |
| 50-4-0L | 5/2 Secondary reference U.S. Government activity |
| 50-4-0L | 5/9 Secondary reference Fmc Corp Link-Belt Div |
| QUADRUPLE148-0L | 5/9 Secondary reference Diamond Chain Co Div of Amsted Industries Inc |
| 50-4-0L | 5/9 Secondary reference Link-Belt Cranes, L.p., Lllp |
| RC50-4-0L | 5/9 Secondary reference Link-Belt Cranes, L.p., Lllp |
NSN 3020-00-239-8225 is a Link,roller Chain, manufactured by Union Chain Div of Ust Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-239-8225 has 4 manufacturer part numbers on file: 50-4-0L (Jeffrey Chain L.p.), 50-40L (Altra Industrial Motion Corp.), 50-40L (Union Chain Div of Ust Inc), ASA50-4-0L (Diamond Chain Co Div of Amsted Industries Inc).
Key specifications for 50-40L: Link Plate Nominal Thickness: 0.0800 INCHES IN; Link Plate Width at Pin End: 0.512 INCHES NOMINAL IN; Link Style: ROLLER, TAPERED EDGE; Link Plate Width at Bushing End: 0.594 INCHES NOMINAL IN. 12 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.