The Spring,helical,extension, cataloged under National Stock Number 5360-00-558-8566, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-558-8566 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.750 INCHES NOMINAL IN |
| End Style | RAISED HOOK FIRST END |
| End Style | SHORT TWISTED HOOK SECOND END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.500 INCHES NOMINAL FIRST END IN |
| Material Document and Classification | QQ-W-470A FED SPEC SINGLE MATERIAL RESPONSE OVERALL A |
| Spring Free Length | 4.400 INCHES NOMINAL IN |
| Coil to Hook Inside Length | 0.540 INCHES MINIMUM AND 0.600 INCHES MAXIMUM SECOND END IN |
| Coil to Hook Inside Length | 0.900 INCHES MINIMUM AND 0.960 INCHES MAXIMUM FIRST END IN |
| Inside Diameter | 0.550 INCHES NOMINAL IN |
| Coil Quantity | 27 |
| Surface Treatment | CADMIUM OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| CV15-410853-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5360-00-558-8566 is a Spring,helical,extension, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
Key specifications for 5360-00-558-8566: Spring Free Outside Diameter: 0.750 INCHES NOMINAL IN; End Style: RAISED HOOK FIRST END; End Style: SHORT TWISTED HOOK SECOND END; Design Type: CLOSED. 14 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.