The Chain,roller, cataloged under National Stock Number 3020-01-263-3121, 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 Roller Bearing Co of America, Inc Div Pic Design. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-263-3121 |
| Primary Part Number | EL-10.4-P |
| Item Name | Chain,roller |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Roller Bearing Co of America, Inc Div Pic Design |
| Status | ACTIVE |
| Second Chain Link Plate Nominal Thickness | 0.0156 INCHES IN |
| Second Chain Link Bushing Nominal Outside Diameter | 0.0900 INCHES IN |
| Pin Overall Length | 0.1750 INCHES NOMINAL IN |
| Second Chain Link Style | ROLLERLESS |
| Effective Length | 1.2783 FEET NOMINAL FT |
| Second Chain Link Nominal Width Between Plates | 0.0720 INCHES IN |
| First Chain Link Style | PIN |
| First Chain Link Pin Nominal Diameter | 0.0620 INCHES IN |
| First Chain Link Plate Width | 0.138 INCHES NOMINAL IN |
| Pin Fastening Method | RIVETED AND SPRING CLIP |
| Surface Treatment | PASSIVATE |
| Second Chain Link Plate Width | 0.138 INCHES NOMINAL IN |
| First Chain Link Nominal Width Between Plates | 0.1354 INCHES IN |
| Link Row Quantity | 1 |
| Material | STEEL CORROSION RESISTING |
| First Chain Link Plate Nominal Thickness | 0.0156 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 |
|---|---|
| EL-10.4-P PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
| Reference | Meaning |
|---|---|
| A3041506 | 7/2 Vendor item drawing reference U.S. Government activity |
| 10447SS | 5/9 Secondary reference Diamond Chain Co Div of Amsted Industries Inc |
NSN 3020-01-263-3121 is a Chain,roller, manufactured by Roller Bearing Co of America, Inc Div Pic Design, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-263-3121 has 1 manufacturer part number on file: EL-10.4-P (Roller Bearing Co of America, Inc Div Pic Design).
Key specifications for EL-10.4-P: Second Chain Link Plate Nominal Thickness: 0.0156 INCHES IN; Second Chain Link Bushing Nominal Outside Diameter: 0.0900 INCHES IN; Pin Overall Length: 0.1750 INCHES NOMINAL IN; Second Chain Link Style: ROLLERLESS. 16 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.