The Chain,roller, cataloged under National Stock Number 3020-00-797-6404, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3020-00-797-6404 |
| Primary Part Number | 7976404 |
| Item Name | Chain,roller |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Second Chain Link Pin Nominal Diameter | 0.1560 INCHES IN |
| FSC Application Data | POWER TAKE-OFF,TRANSMISSION,VEHICULAR |
| Second Chain Link Plate Nominal Thickness | 0.0600 INCHES IN |
| First Chain Link Roller Nominal Diameter | 0.3120 INCHES IN |
| Second Chain Link Style | PIN |
| Effective Length | 2.8330 FEET NOMINAL FT |
| Second Chain Link Nominal Width Between Plates | 0.4320 INCHES IN |
| First Chain Link Style | ROLLER |
| Nominal Pitch Distance | 0.500 INCHES IN |
| First Chain Link Plate Width | 0.475 INCHES NOMINAL IN |
| Pin Fastening Method | RIVETED |
| Second Chain Link Plate Width | 0.452 INCHES NOMINAL IN |
| Minimum Tensile Strength | 3700 POUNDS PER SQUARE INCH LBS |
| First Chain Link Nominal Width Between Plates | 0.3120 INCHES IN |
| Link Row Quantity | 1 |
| Material | STEEL |
| First Chain Link Plate Nominal Thickness | 0.0600 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 |
|---|---|
| 7976404 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| RC40-68LINKS | 5/9 Secondary reference U.S. Government activity |
NSN 3020-00-797-6404 is a Chain,roller, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-797-6404 has 1 manufacturer part number on file: 7976404 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7976404: Second Chain Link Pin Nominal Diameter: 0.1560 INCHES IN; FSC Application Data: POWER TAKE-OFF,TRANSMISSION,VEHICULAR; Second Chain Link Plate Nominal Thickness: 0.0600 INCHES IN; First Chain Link Roller Nominal Diameter: 0.3120 INCHES IN. 17 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.