The Chain,roller, cataloged under National Stock Number 3020-01-227-5978, 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 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-227-5978 |
| Primary Part Number | EL-17.6 |
| 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 Pin Nominal Diameter | 0.0620 INCHES IN |
| Second Chain Link Plate Nominal Thickness | 0.0330 INCHES IN |
| First Chain Link Roller Nominal Diameter | 0.0900 INCHES IN |
| Second Chain Link Style | PIN |
| Effective Length | 2.1879 FEET NOMINAL FT |
| Second Chain Link Nominal Width Between Plates | 0.0720 INCHES IN |
| First Chain Link Style | ROLLER |
| First Chain Link Plate Width | 0.138 INCHES NOMINAL IN |
| Pin Fastening Method | RIVETED AND SPRING CLIP |
| Second Chain Link Plate Width | 0.138 INCHES NOMINAL IN |
| First Chain Link Nominal Width Between Plates | 0.0720 INCHES IN |
| Link Row Quantity | 1 |
| Material | STEEL |
| First Chain Link Plate Nominal Thickness | 0.0330 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-17.6 PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
| Reference | Meaning |
|---|---|
| RC14SS-176 | 5/9 Secondary reference W. M. Berg, Inc. |
| 570092 | 7/2 Vendor item drawing reference R F Products, Inc |
NSN 3020-01-227-5978 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 3020-01-227-5978 has 1 manufacturer part number on file: EL-17.6 (Roller Bearing Co of America, Inc Div Pic Design).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-439-8622. Verify interchangeability with system specifications before substitution.
Key specifications for EL-17.6: Second Chain Link Pin Nominal Diameter: 0.0620 INCHES IN; Second Chain Link Plate Nominal Thickness: 0.0330 INCHES IN; First Chain Link Roller Nominal Diameter: 0.0900 INCHES IN; Second Chain Link Style: PIN. 14 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.