The Spring,helical,extension, cataloged under National Stock Number 5360-00-320-6778, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Regal Air, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-320-6778 |
| Primary Part Number | 0660123 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Regal Air, Inc. |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.688 INCHES NOMINAL IN |
| Load Rating | 14.00 POUNDS NOMINAL LBS |
| End Style | RAISED HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.250 INCHES NOMINAL BOTH ENDS IN |
| Spring Free Length | 7.595 INCHES NOMINAL IN |
| Spring Deflection Rate | 0.930 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.562 INCHES NOMINAL IN |
| Coil Quantity | 100-1/2 |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL OVERALL |
| Hook Radius | 0.281 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 |
|---|---|
| 0660123 PRIMARY | Regal Air, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 0660123 | 5/9 Secondary reference Cessna Aircraft Company Dba Textron Aviation |
NSN 5360-00-320-6778 is a Spring,helical,extension, manufactured by Regal Air, Inc., classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-320-6778 has 1 manufacturer part number on file: 0660123 (Regal Air, Inc.).
Key specifications for 0660123: Spring Free Outside Diameter: 0.688 INCHES NOMINAL IN; Load Rating: 14.00 POUNDS NOMINAL LBS; End Style: RAISED 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.