The Spring,helical,extension, cataloged under National Stock Number 5360-00-055-2979, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-055-2979 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Status | ACTIVE |
| Spring Free Outside Diameter | 1.624 INCHES NOMINAL IN |
| Load Rating | 42.750 POUNDS MINIMUM AND 47.250 POUNDS MAXIMUM LBS |
| End Style | FULL LOOP SECOND END |
| End Style | DOBBY HOOK FIRST END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 1.100 INCHES NOMINAL FIRST END IN |
| Opening Width | 0.380 INCHES NOMINAL SECOND END IN |
| Material Document and Classification | QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 18.634 INCHES NOMINAL IN |
| Spring Deflection Rate | 14.000 POUNDS PER INCH MINIMUM AND 16.000 POUNDS PER INCH MAXIMUM LBS |
| Coil to Hook Inside Length | 1.500 INCHES NOMINAL FIRST END IN |
| Coil to Hook Inside Length | 13.090 INCHES NOMINAL SECOND END IN |
| Inside Diameter | 1.300 INCHES NOMINAL IN |
| Spring Length Under Load | 3.000 INCHES NOMINAL IN |
| Coil Quantity | 22 |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL UNS K08500 OVERALL |
| Hook Radius | 0.500 INCHES NOMINAL SECOND END IN |
| Hook Radius | 0.250 INCHES NOMINAL FIRST END IN |
| 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 |
|---|---|
| 204-070-458-3 | 3/2 Design control — primary reference U.S. Government activity |
| 204-070-458-003 | 5/2 Secondary reference U.S. Government activity |
NSN 5360-00-055-2979 is a Spring,helical,extension, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
Key specifications for 5360-00-055-2979: Spring Free Outside Diameter: 1.624 INCHES NOMINAL IN; Load Rating: 42.750 POUNDS MINIMUM AND 47.250 POUNDS MAXIMUM LBS; End Style: FULL LOOP SECOND END; End Style: DOBBY HOOK FIRST END. 20 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.