The Spring,helical,extension, cataloged under National Stock Number 5360-00-562-1374, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-562-1374 |
| Primary Part Number | 1F4449 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.785 INCHES NOMINAL IN |
| Load Rating | 17.400 POUNDS NOMINAL LBS |
| End Style | MACHINE LOOP BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.732 INCHES NOMINAL BOTH ENDS IN |
| Spring Free Length | 0.391 INCHES NOMINAL IN |
| Spring Deflection Rate | 9.870 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.625 INCHES NOMINAL IN |
| Spring Length Under Load | 20.400 INCHES NOMINAL IN |
| Coil Quantity | 17 |
| Coil Helix Direction | RIGHT-HAND |
| Material | STEEL OVERALL |
| Hook Radius | 0.250 INCHES NOMINAL BOTH ENDS 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 |
|---|---|
| 1F4449 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5360-00-562-1374 is a Spring,helical,extension, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-562-1374 has 1 manufacturer part number on file: 1F4449 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 1F4449: Spring Free Outside Diameter: 0.785 INCHES NOMINAL IN; Load Rating: 17.400 POUNDS NOMINAL LBS; End Style: MACHINE LOOP BOTH ENDS; 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.