The Spring,helical,extension, cataloged under National Stock Number 5360-01-071-0591, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-01-071-0591 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.160 INCHES NOMINAL IN |
| End Style | LONG ROUND HOOK BOTH ENDS |
| Design Type | OPEN |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.193 INCHES NOMINAL SECOND END IN |
| Spring Free Length | 1.156 INCHES MINIMUM AND 1.236 INCHES MAXIMUM IN |
| Coil to Hook Inside Length | 0.230 INCHES NOMINAL SECOND END IN |
| Inside Diameter | 0.124 INCHES NOMINAL IN |
| Coil Quantity | 41 |
| Coil Helix Direction | RIGHT-HAND OR 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 |
| Reference | Meaning |
|---|---|
| B27077-1 | 5/9 Secondary reference Richards Imagery Interpretation Systems, L.l.c. |
| 27077-1 | 3/9 Design control — primary reference Richards Imagery Interpretation Systems, L.l.c. |
NSN 5360-01-071-0591 is a Spring,helical,extension, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1730-01-527-5789. Verify interchangeability with system specifications before substitution.
Key specifications for 5360-01-071-0591: Spring Free Outside Diameter: 0.160 INCHES NOMINAL IN; End Style: LONG ROUND HOOK BOTH ENDS; Design Type: OPEN; Style Designator: CYLINDRICAL. 11 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.