The Spring,helical,extension, cataloged under National Stock Number 5360-00-663-1589, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5360-00-663-1589 |
| Primary Part Number | 2331956 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.875 INCHES NOMINAL IN |
| End Style | RAISED HOOK FIRST END |
| End Style | SHORT TWISTED HOOK SECOND END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 1.937 INCHES NOMINAL FIRST END IN |
| Material Document and Classification | MIL-W-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 8.312 INCHES NOMINAL IN |
| Coil to Hook Inside Length | 0.530 INCHES NOMINAL SECOND END IN |
| Coil to Hook Inside Length | 2.467 INCHES NOMINAL FIRST END IN |
| Inside Diameter | 0.685 INCHES NOMINAL IN |
| Coil Quantity | 52 |
| Surface Treatment | CADMIUM OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL 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 |
|---|---|
| 2331956 | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 2331956 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5360-00-663-1589 is a Spring,helical,extension, manufactured by The Boeing Company, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-663-1589 has 1 manufacturer part number on file: 2331956 (The Boeing Company).
Key specifications for 2331956: Spring Free Outside Diameter: 0.875 INCHES NOMINAL IN; End Style: RAISED HOOK FIRST END; End Style: SHORT TWISTED HOOK SECOND END; Design Type: CLOSED. 15 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.