The Spring,helical,extension, cataloged under National Stock Number 5360-00-312-3979, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Siemens Energy and Automation Inc Siemens Furnas Controls Div. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-312-3979 |
| Primary Part Number | D6171-1 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Siemens Energy and Automation Inc Siemens Furnas Controls Div |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.356 INCHES NOMINAL IN |
| Load Rating | 9.00 POUNDS NOMINAL LBS |
| End Style | SHORT TWISTED HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Spring Free Length | 1.363 INCHES NOMINAL IN |
| Inside Diameter | 0.274 INCHES NOMINAL IN |
| Spring Length Under Load | 2.250 INCHES NOMINAL IN |
| Coil Quantity | 19 |
| Surface Treatment | ZINC AND DICHROMATE OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL OVERALL |
| Hook Radius | 0.110 INCHES NOMINAL BOTH ENDS 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 |
|---|---|
| D6171-1 PRIMARY | Siemens Energy and Automation Inc Siemens Furnas Controls Div (USA) |
NSN 5360-00-312-3979 is a Spring,helical,extension, manufactured by Siemens Energy and Automation Inc Siemens Furnas Controls Div, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-312-3979 has 1 manufacturer part number on file: D6171-1 (Siemens Energy and Automation Inc Siemens Furnas Controls Div).
Key specifications for D6171-1: Spring Free Outside Diameter: 0.356 INCHES NOMINAL IN; Load Rating: 9.00 POUNDS NOMINAL LBS; End Style: SHORT TWISTED HOOK BOTH ENDS; Design Type: CLOSED. 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.