The Spring,helical,extension, cataloged under National Stock Number 5360-00-753-3840, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Mitsubishi Caterpillar Forklift America, Inc. Government technical data includes 13 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 | 5360-00-753-3840 |
| Primary Part Number | A3663 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Mitsubishi Caterpillar Forklift America, Inc |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.438 INCHES NOMINAL IN |
| Load Rating | 25.000 POUNDS NOMINAL LBS |
| End Style | MACHINE LOOP BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.250 INCHES NOMINAL BOTH ENDS IN |
| Spring Free Length | 7.269 INCHES NOMINAL IN |
| Spring Deflection Rate | 9.260 POUNDS PER INCH NOMINAL LBS |
| Coil to Hook Inside Length | 0.500 INCHES NOMINAL BOTH ENDS IN |
| Spring Length Under Load | 9.250 INCHES NOMINAL IN |
| Coil Quantity | 85 |
| Coil Helix Direction | RIGHT-HAND OR LEFT-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 |
|---|---|
| A3663 PRIMARY | Mitsubishi Caterpillar Forklift America, Inc (USA) |
NSN 5360-00-753-3840 is a Spring,helical,extension, manufactured by Mitsubishi Caterpillar Forklift America, Inc, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-753-3840 has 1 manufacturer part number on file: A3663 (Mitsubishi Caterpillar Forklift America, Inc).
Key specifications for A3663: Spring Free Outside Diameter: 0.438 INCHES NOMINAL IN; Load Rating: 25.000 POUNDS NOMINAL LBS; End Style: MACHINE LOOP BOTH ENDS; Design Type: CLOSED. 13 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.