The Spring,helical,extension, cataloged under National Stock Number 5360-01-657-3696, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp.. Government technical data includes 7 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 | 5360-01-657-3696 |
| Primary Part Number | 660 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp. |
| Status | ACTIVE |
| Spring Free Outside Diameter | 1.500 INCHES NOMINAL IN |
| Hook to Hook Free Inside Length | 11.500 INCHES NOMINAL IN |
| Load Rating | 47.000 POUNDS MAXIMUM LBS |
| End Style | SHORT TWISTED HOOK BOTH ENDS |
| Style Designator | CYLINDRICAL |
| Spring Deflection Rate | 15.000 POUNDS PER INCH MAXIMUM LBS |
| Stock Diameter | 0.135 INCHES NOMINAL 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 |
|---|---|
| 660 PRIMARY | Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp. (USA) |
NSN 5360-01-657-3696 is a Spring,helical,extension, manufactured by Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp., classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-01-657-3696 has 1 manufacturer part number on file: 660 (Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp.).
Key specifications for 660: Spring Free Outside Diameter: 1.500 INCHES NOMINAL IN; Hook to Hook Free Inside Length: 11.500 INCHES NOMINAL IN; Load Rating: 47.000 POUNDS MAXIMUM LBS; End Style: SHORT TWISTED HOOK BOTH ENDS. 7 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.