The Spring,helical,extension, cataloged under National Stock Number 5360-00-797-9643, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-797-9643 |
| Primary Part Number | A559-78PCALL |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.120 INCHES NOMINAL IN |
| Load Rating | 1.80 POUNDS NOMINAL LBS |
| End Style | SHORT TWISTED HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 1.036 INCHES NOMINAL IN |
| Spring Deflection Rate | 2.750 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.084 INCHES NOMINAL IN |
| Spring Length Under Load | 1.600 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL COMP 302 OVERALL |
| Hook Radius | 0.042 INCHES NOMINAL BOTH ENDS IN |
| 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 |
|---|---|
| A559-78PCALL PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| F559-5ITEM42 | L3 Technologies, Inc. Div L3 Keo (USA) |
NSN 5360-00-797-9643 is a Spring,helical,extension, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-797-9643 has 2 manufacturer part numbers on file: A559-78PCALL (L3 Technologies, Inc. Div L3 Keo), F559-5ITEM42 (L3 Technologies, Inc. Div L3 Keo).
Key specifications for A559-78PCALL: Spring Free Outside Diameter: 0.120 INCHES NOMINAL IN; Load Rating: 1.80 POUNDS NOMINAL LBS; End Style: SHORT TWISTED HOOK BOTH ENDS; 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.