The Spring,helical,extension, cataloged under National Stock Number 5360-00-326-3428, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 19 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 | 5360-00-326-3428 |
| Primary Part Number | S1620-61294 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.400 INCHES NOMINAL IN |
| Load Rating | 11.250 POUNDS MINIMUM AND 13.250 POUNDS MAXIMUM LBS |
| End Style | SHORT TWISTED HOOK SECOND END |
| End Style | DOBBY HOOK FIRST END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.625 INCHES NOMINAL FIRST END IN |
| Material Document and Classification | QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 2.540 INCHES NOMINAL IN |
| Coil to Hook Inside Length | 0.449 INCHES NOMINAL SECOND END IN |
| Coil to Hook Inside Length | 0.949 INCHES NOMINAL FIRST END IN |
| Inside Diameter | 0.298 INCHES NOMINAL IN |
| Spring Length Under Load | 3.375 INCHES NOMINAL IN |
| Coil Quantity | 20 |
| Surface Treatment | CADMIUM OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL UNS K08500 OVERALL |
| Hook Radius | 0.125 INCHES NOMINAL FIRST END IN |
| Hook Radius | 0.156 INCHES NOMINAL SECOND END 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 |
|---|---|
| S1620-61294 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5360-00-326-3428 is a Spring,helical,extension, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-326-3428 has 1 manufacturer part number on file: S1620-61294 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S1620-61294: Spring Free Outside Diameter: 0.400 INCHES NOMINAL IN; Load Rating: 11.250 POUNDS MINIMUM AND 13.250 POUNDS MAXIMUM LBS; End Style: SHORT TWISTED HOOK SECOND END; End Style: DOBBY HOOK FIRST END. 19 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.