The Chain,roller, cataloged under National Stock Number 3020-00-181-2873, 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 18 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 3020-00-181-2873 |
| Primary Part Number | EL18 |
| 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 | 0.0150 INCHES IN |
| Second Chain Link Bushing Nominal Outside Diameter | 0.0900 INCHES IN |
| Pin Overall Length | 0.2050 INCHES NOMINAL IN |
| Second Chain Link Style | ROLLERLESS |
| Effective Length | 2.2125 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 |
| End Connection Style | PIN |
| Nominal Pitch Distance | 0.1475 INCHES IN |
| First Chain Link Plate Width | 0.138 INCHES NOMINAL IN |
| Pin Fastening Method | SPRING CLIP |
| Bushing Hole Diameter | 0.0590 INCHES NOMINAL IN |
| Second Chain Link Plate Width | 0.138 INCHES NOMINAL IN |
| First Chain Link Nominal Width Between Plates | 0.1020 INCHES IN |
| Link Row Quantity | 1 |
| Material | STEEL |
| First Chain Link Plate Nominal Thickness | 0.0150 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 |
NSN 3020-00-181-2873 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 3020-00-181-2873 has 3 manufacturer part numbers on file: 438745-1 (Raytheon Company), 438838-1 (Raytheon Company), EL18 (Roller Bearing Co of America, Inc Div Pic Design).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-538-0948. Verify interchangeability with system specifications before substitution.
Key specifications for EL18: Second Chain Link Plate Nominal Thickness: 0.0150 INCHES IN; Second Chain Link Bushing Nominal Outside Diameter: 0.0900 INCHES IN; Pin Overall Length: 0.2050 INCHES NOMINAL IN; Second Chain Link Style: ROLLERLESS. 18 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.