The Chain,roller, cataloged under National Stock Number 3020-01-428-6952, 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 Naval Sea Systems Command. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-428-6952 |
| Primary Part Number | 6894425 |
| Item Name | Chain,roller |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Second Chain Link Pin Nominal Diameter | 0.9370 INCHES IN |
| Second Chain Link Plate Nominal Thickness | 0.3750 INCHES IN |
| First Chain Link Roller Nominal Diameter | 1.8750 INCHES IN |
| Second Chain Link Style | PIN |
| Effective Length | 48.0000 INCHES NOMINAL IN |
| Second Chain Link Nominal Width Between Plates | 2.6250 INCHES IN |
| First Chain Link Style | ROLLER |
| Nominal Pitch Distance | 3.0000 INCHES IN |
| First Chain Link Plate Width | 2.8000 INCHES NOMINAL IN |
| Pin Fastening Method | COTTER PIN |
| Second Chain Link Plate Width | 2.8000 INCHES NOMINAL IN |
| First Chain Link Nominal Width Between Plates | 1.8750 INCHES IN |
| Link Row Quantity | 1 |
| Material | STEEL |
| First Chain Link Plate Nominal Thickness | 2.2700 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 |
|---|---|
| 6894422 ITEM 40 | Naval Sea Systems Command (USA) |
| 6894425 PRIMARY | Naval Sea Systems Command (USA) |
| 240-16PITCHES | Diamond Chain Co Div of Amsted Industries Inc (USA) |
| 240-16PITCHES | Rexnord Holdings Inc (USA) |
| Reference | Meaning |
|---|---|
| 240-16PITCHES | 5/9 Secondary reference Emerson Electric Co Browning Mfg Div |
| 240-16PITCHES | 5/9 Secondary reference Rexnord Industries Inc. Div Roller Chain Operation |
| 240-16PITCHES | 5/9 Secondary reference Emerson Power Transmission Corporation Div Ept |
| 6894422 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3020-01-428-6952 is a Chain,roller, manufactured by Naval Sea Systems Command, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-428-6952 has 4 manufacturer part numbers on file: 6894422 ITEM 40 (Naval Sea Systems Command), 6894425 (Naval Sea Systems Command), 240-16PITCHES (Diamond Chain Co Div of Amsted Industries Inc), 240-16PITCHES (Rexnord Holdings Inc).
6 possible matches (shared part number, not a government interchangeability claim): 3040-01-429-8356, 3040-01-429-8360, 3040-01-429-8362. Verify interchangeability with system specifications before substitution.
Key specifications for 6894425: Second Chain Link Pin Nominal Diameter: 0.9370 INCHES IN; Second Chain Link Plate Nominal Thickness: 0.3750 INCHES IN; First Chain Link Roller Nominal Diameter: 1.8750 INCHES IN; Second Chain Link Style: PIN. 15 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.