The Spring,helical,extension, cataloged under National Stock Number 5360-00-426-5940, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Hf Group Inc Dba Hf Group Inc. Government technical data includes 15 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-426-5940 |
| Primary Part Number | 205616 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Hf Group Inc Dba Hf Group Inc |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.352 INCHES NOMINAL IN |
| End Style | SHORT TWISTED HOOK FIRST END |
| End Style | MACHINE HOOK SECOND END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.250 INCHES NOMINAL SECOND END IN |
| Spring Free Length | 2.551 INCHES NOMINAL IN |
| Coil to Hook Inside Length | 0.199 INCHES NOMINAL FIRST END IN |
| Coil to Hook Inside Length | 0.199 INCHES NOMINAL SECOND END IN |
| Inside Diameter | 0.250 INCHES NOMINAL IN |
| End Hook Length | 0.699 INCHES NOMINAL SECOND END IN |
| Surface Treatment | PASSIVATE OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL COMP 302 OVERALL |
| Hook Radius | 0.099 INCHES NOMINAL FIRST 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 |
|---|---|
| 205616 PRIMARY | Hf Group Inc Dba Hf Group Inc (USA) |
NSN 5360-00-426-5940 is a Spring,helical,extension, manufactured by Hf Group Inc Dba Hf Group Inc, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-426-5940 has 1 manufacturer part number on file: 205616 (Hf Group Inc Dba Hf Group Inc).
2 possible matches (shared part number, not a government interchangeability claim): 3110-01-592-1338, 5331-01-622-3153. Verify interchangeability with system specifications before substitution.
Key specifications for 205616: Spring Free Outside Diameter: 0.352 INCHES NOMINAL IN; End Style: SHORT TWISTED HOOK FIRST END; End Style: MACHINE HOOK SECOND END; Design Type: CLOSED. 15 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.