The Spring,helical,extension, cataloged under National Stock Number 5360-00-943-0397, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Psi-Peripheral Support. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5360-00-943-0397 |
| Primary Part Number | C418057 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Psi-Peripheral Support |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.250 INCHES NOMINAL IN |
| End Style | SHORT TWISTED HOOK SECOND END |
| End Style | DOBBY HOOK FIRST END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.812 INCHES NOMINAL FIRST END IN |
| Spring Free Length | 2.749 INCHES NOMINAL IN |
| Coil to Hook Inside Length | 0.937 INCHES NOMINAL FIRST END IN |
| Coil to Hook Inside Length | 0.343 INCHES NOMINAL SECOND END IN |
| Inside Diameter | 0.188 INCHES NOMINAL IN |
| Coil Quantity | 49 |
| Surface Treatment | CADMIUM OVERALL |
| Coil Helix Direction | RIGHT-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 |
|---|---|
| C418057 PRIMARY | Psi-Peripheral Support (USA) |
| Reference | Meaning |
|---|---|
| C418057 | 3/9 Design control — primary reference Miltope Corporation |
NSN 5360-00-943-0397 is a Spring,helical,extension, manufactured by Psi-Peripheral Support, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-943-0397 has 1 manufacturer part number on file: C418057 (Psi-Peripheral Support).
Key specifications for C418057: Spring Free Outside Diameter: 0.250 INCHES NOMINAL IN; End Style: SHORT TWISTED HOOK SECOND END; End Style: DOBBY HOOK FIRST END; 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.