The Spring,helical,extension, cataloged under National Stock Number 5360-01-121-8755, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-01-121-8755 |
| Primary Part Number | 1111AS-300-4 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.240 INCHES NOMINAL IN |
| Load Rating | 5.831 POUNDS NOMINAL LBS |
| End Style | SHORT TWISTED HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE OR AMS 5688 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 1.188 INCHES NOMINAL IN |
| Spring Deflection Rate | 8.830 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.172 INCHES NOMINAL IN |
| Spring Length Under Load | 1.720 INCHES NOMINAL IN |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL COMP 302 OVERALL |
| Hook Radius | 0.086 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 |
|---|---|
| 1111AS-300-4 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| LE-034C-2SS | Lee Spring Company Llc (USA) |
| Reference | Meaning |
|---|---|
| E0240-034-1120S | 3/2 Design control — primary reference U.S. Government activity |
| LE-034C-2SS | 5/9 Secondary reference U.S. Government activity |
NSN 5360-01-121-8755 is a Spring,helical,extension, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-01-121-8755 has 2 manufacturer part numbers on file: 1111AS-300-4 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), LE-034C-2SS (Lee Spring Company Llc).
Key specifications for 1111AS-300-4: Spring Free Outside Diameter: 0.240 INCHES NOMINAL IN; Load Rating: 5.831 POUNDS NOMINAL LBS; End Style: SHORT TWISTED HOOK 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.