The Chain,roller, cataloged under National Stock Number 3020-01-445-9707, 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 Diamond Chain Co Div of Amsted Industries Inc. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-445-9707 |
| Primary Part Number | NO.40-55PITCHES |
| Item Name | Chain,roller |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Diamond Chain Co Div of Amsted Industries Inc |
| Status | ACTIVE |
| Second Chain Link Pin Nominal Diameter | 0.1560 INCHES IN |
| Second Chain Link Plate Nominal Thickness | 0.0600 INCHES IN |
| First Chain Link Roller Nominal Diameter | 0.3120 INCHES IN |
| Pin Overall Length | 0.5700 INCHES NOMINAL IN |
| Second Chain Link Style | PIN |
| Effective Length | 55.0000 INCHES NOMINAL IN |
| Second Chain Link Nominal Width Between Plates | 0.3120 INCHES IN |
| First Chain Link Style | ROLLER |
| Nominal Pitch Distance | 0.5000 INCHES IN |
| First Chain Link Plate Width | 0.4100 INCHES NOMINAL IN |
| Pin Fastening Method | RIVETED |
| Second Chain Link Plate Width | 0.4750 INCHES NOMINAL IN |
| First Chain Link Nominal Width Between Plates | 0.3125 INCHES IN |
| Link Row Quantity | 1 |
| Material | STEEL |
| First Chain Link Plate Nominal Thickness | 0.0600 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 |
|---|---|
| NO.40-55PITCHES PRIMARY | Diamond Chain Co Div of Amsted Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| NO.40-55PITCHES | 5/9 Secondary reference Emerson Power Transmission Corporation Div Ept |
| NO.40-55PITCHES | 5/9 Secondary reference The Charles Machine Works Inc Dba Ditch Witch |
| NO.40-55PITCHES | 5/9 Secondary reference Rexnord Industries Inc. Div Roller Chain Operation |
| 130-021 | 5/9 Secondary reference The Charles Machine Works Inc Dba Ditch Witch |
NSN 3020-01-445-9707 is a Chain,roller, manufactured by Diamond Chain Co Div of Amsted Industries Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-445-9707 has 1 manufacturer part number on file: NO.40-55PITCHES (Diamond Chain Co Div of Amsted Industries Inc).
1 possible match (shared part number, not a government interchangeability claim): 3130-01-553-3491. Verify interchangeability with system specifications before substitution.
Key specifications for NO.40-55PITCHES: Second Chain Link Pin Nominal Diameter: 0.1560 INCHES IN; Second Chain Link Plate Nominal Thickness: 0.0600 INCHES IN; First Chain Link Roller Nominal Diameter: 0.3120 INCHES IN; Pin Overall Length: 0.5700 INCHES NOMINAL IN. 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.