The Chain,roller, cataloged under National Stock Number 3020-01-356-4591, 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 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-356-4591 |
| Primary Part Number | 40SS-108.5 IN. |
| 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 | 0.3125 INCHES IN |
| Pin Overall Length | 0.7200 INCHES NOMINAL IN |
| Second Chain Link Style | PIN |
| Effective Length | 9.0417 FEET NOMINAL FT |
| Second Chain Link Nominal Width Between Plates | 0.3245 INCHES IN |
| First Chain Link Style | ROLLER |
| First Chain Link Plate Width | 0.475 INCHES NOMINAL IN |
| Pin Fastening Method | RIVETED AND SPRING CLIP |
| Second Chain Link Plate Width | 0.410 INCHES NOMINAL IN |
| First Chain Link Nominal Width Between Plates | 0.3125 INCHES IN |
| Link Row Quantity | 1 |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 40SS-108.5 IN. PRIMARY | Diamond Chain Co Div of Amsted Industries Inc (USA) |
| 40SS-217 PITCHES PRIMARY | Diamond Chain Co Div of Amsted Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 6284092 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 3020-01-356-4591 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 3020-01-356-4591 has 2 manufacturer part numbers on file: 40SS-108.5 IN. (Diamond Chain Co Div of Amsted Industries Inc), 40SS-217 PITCHES (Diamond Chain Co Div of Amsted Industries Inc).
Key specifications for 40SS-108.5 IN.: 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: 0.3125 INCHES IN; Pin Overall Length: 0.7200 INCHES NOMINAL IN. 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.