The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-366-1131, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc. Government technical data includes 9 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-366-1131 |
| Primary Part Number | 40079543 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc |
| Status | ACTIVE |
| First Step Diameter | 1.7500 INCHES NOMINAL IN |
| End Diameter | 1.0580 INCHES NOMINAL IN |
| Distance From End to First Step | 0.5890 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Length | 0.4610 INCHES NOMINAL IN |
| Bore Taper in Deg | 10.0 |
| Bore Diameter | 0.8750 INCHES NOMINAL IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 40079543 PRIMARY | Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc (USA) |
| Reference | Meaning |
|---|---|
| 8081795 | 5/9 Secondary reference Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc |
| 8081795 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
| K-8081795 | 3/9 Design control — primary reference Korody-Colyer Corp a Cr Industries Co |
| 8081705 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5340-00-366-1131 is a Seat,helical Compression Spring, manufactured by Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-366-1131 has 1 manufacturer part number on file: 40079543 (Progress Rail Locomotive Inc. Dba Progress Rail Switching Services Llc).
1 possible match (shared part number, not a government interchangeability claim): 7050-01-486-8225. Verify interchangeability with system specifications before substitution.
Key specifications for 40079543: Overall Height: 0.7500 INCHES NOMINAL IN; First Step Diameter: 1.7500 INCHES NOMINAL IN; End Diameter: 1.0580 INCHES NOMINAL IN; Distance From End to First Step: 0.5890 INCHES NOMINAL IN. 9 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.