The Spring,helical,extension, cataloged under National Stock Number 5360-00-260-3447, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is L3 Technologies, Inc. Div Communication Systems-East. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-260-3447 |
| Primary Part Number | K855424PT1 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | L3 Technologies, Inc. Div Communication Systems-East |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.408 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN |
| End Style | MACHINE LOOP BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Spring Free Length | 3.472 INCHES NOMINAL IN |
| Inside Diameter | 0.286 INCHES NOMINAL IN |
| Coil Quantity | 35 |
| Coil Helix Direction | LEFT-HAND |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| K855424PT1 PRIMARY | L3 Technologies, Inc. Div Communication Systems-East (USA) |
| Reference | Meaning |
|---|---|
| K855424PT1 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
NSN 5360-00-260-3447 is a Spring,helical,extension, manufactured by L3 Technologies, Inc. Div Communication Systems-East, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-260-3447 has 1 manufacturer part number on file: K855424PT1 (L3 Technologies, Inc. Div Communication Systems-East).
Key specifications for K855424PT1: Spring Free Outside Diameter: 0.408 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN; End Style: MACHINE LOOP BOTH ENDS; Design Type: CLOSED; Style Designator: CYLINDRICAL. 9 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.