The Spring,helical,extension, cataloged under National Stock Number 5360-01-028-8571, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Fnss Savunma Sistemleri Anonim Sirketi. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5360-01-028-8571 |
| Primary Part Number | 4185499 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Fnss Savunma Sistemleri Anonim Sirketi |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.657 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN |
| Load Rating | 13.500 POUNDS NOMINAL LBS |
| End Style | SHORT TWISTED HOOK BOTH ENDS |
| Design Type | OPEN |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | QQ-W-428,TYPE 2,CLASS FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-428,TYPE 2,CLASS 2 FED SPEC 2ND MATERIAL RESPONSE OR QQ-W-470 FED SPEC 3RD MATERIAL RESPONSE OVERALL |
| Spring Free Length | 4.690 INCHES MINIMUM AND 4.810 INCHES MAXIMUM IN |
| Inside Diameter | 0.475 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN |
| Coil Quantity | 8 |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 4185499 | Fnss Savunma Sistemleri Anonim Sirketi (TUR) |
| Reference | Meaning |
|---|---|
| 4185499 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5360-01-028-8571 is a Spring,helical,extension, manufactured by Fnss Savunma Sistemleri Anonim Sirketi, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-01-028-8571 has 1 manufacturer part number on file: 4185499 (Fnss Savunma Sistemleri Anonim Sirketi).
Key specifications for 4185499: Spring Free Outside Diameter: 0.657 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN; Load Rating: 13.500 POUNDS NOMINAL LBS; End Style: SHORT TWISTED HOOK BOTH ENDS; Design Type: OPEN. 10 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.