The Spring,helical,torsion, cataloged under National Stock Number 5360-00-340-2843, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-340-2843 |
| Primary Part Number | 255AS143-1 |
| Item Name | Spring,helical,torsion |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.488 INCHES MINIMUM AND 0.519 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| End Style | ONE HOOK END OVERALL |
| End Length | 1.172 INCHES NOMINAL BOTH ENDS IN |
| Center Section Width | 0.619 INCHES NOMINAL IN |
| Style Designator | DOUBLE TORSION, RIGHT AND LEFT HAND |
| Material Document and Classification | QQ-W-423,COND B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 1.531 INCHES NOMINAL IN |
| Spring Deflection Rate | 0.140 POUNDS PER INCH NOMINAL LBS |
| Coil Axis to Center Section Distance | 1.866 INCHES NOMINAL IN |
| Inside Diameter | 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Stock Diameter | 0.072 INCHES NOMINAL IN |
| Coil Quantity | 2-1/2 |
| Surface Treatment | PASSIVATE OVERALL |
| Coil Helix Direction | LEFT-HAND |
| Center Style | SQUARE TYPE |
| Material | STEEL COMP 302 OVERALL |
| End Angular Relationship | END W/LH HELIX OF COIL PARALLEL TO CENTER SECTION AND END W/RH HELIX OF COIL PARALLEL TO CENTER SECTION |
| 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 |
|---|---|
| 255AS143-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 5360-00-340-2843 is a Spring,helical,torsion, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-340-2843 has 1 manufacturer part number on file: 255AS143-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 255AS143-1: Spring Free Outside Diameter: 0.488 INCHES MINIMUM AND 0.519 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; End Style: ONE HOOK END OVERALL; End Length: 1.172 INCHES NOMINAL BOTH ENDS IN. 18 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.