The Chain,roller, cataloged under National Stock Number 3020-01-134-5578, 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 Philadelphia Valve Co. Government technical data includes 13 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 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 | 3020-01-134-5578 |
| Primary Part Number | 6138-6 |
| Item Name | Chain,roller |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Philadelphia Valve Co |
| Status | ACTIVE |
| Second Chain Link Plate Nominal Thickness | 0.0500 INCHES IN |
| Second Chain Link Bushing Nominal Outside Diameter | 0.2000 INCHES IN |
| Second Chain Link Style | ROLLERLESS |
| Effective Length | 4.2500 FEET NOMINAL FT |
| Second Chain Link Nominal Width Between Plates | 0.1880 INCHES IN |
| First Chain Link Style | PIN |
| First Chain Link Pin Nominal Diameter | 0.1410 INCHES IN |
| First Chain Link Plate Width | 0.307 INCHES NOMINAL IN |
| Second Chain Link Plate Width | 0.356 INCHES NOMINAL IN |
| First Chain Link Nominal Width Between Plates | 0.2880 INCHES IN |
| Link Row Quantity | 1 |
| Material | STEEL |
| First Chain Link Plate Nominal Thickness | 0.0500 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 |
|---|---|
| 6138-6 PRIMARY | Philadelphia Valve Co (USA) |
NSN 3020-01-134-5578 is a Chain,roller, manufactured by Philadelphia Valve Co, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-134-5578 has 1 manufacturer part number on file: 6138-6 (Philadelphia Valve Co).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-341-4334. Verify interchangeability with system specifications before substitution.
Key specifications for 6138-6: Second Chain Link Plate Nominal Thickness: 0.0500 INCHES IN; Second Chain Link Bushing Nominal Outside Diameter: 0.2000 INCHES IN; Second Chain Link Style: ROLLERLESS; Effective Length: 4.2500 FEET NOMINAL FT. 13 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.