The Spring,helical,compression, cataloged under National Stock Number 5360-01-181-7550, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Lee Spring Company Llc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 5360-01-181-7550 |
| Primary Part Number | LC-055J-7SS |
| Item Name | Spring,helical,compression |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Lee Spring Company Llc |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.705 INCHES MINIMUM AND 0.735 INCHES MAXIMUM IN |
| Load Rating | 8.120 POUNDS NOMINAL LBS |
| End Style | SPRING END,SQUARED AND GROUND BOTH ENDS |
| Spring Solid Length | 0.411 INCHES NOMINAL IN |
| 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 | 2.000 INCHES NOMINAL IN |
| Spring Deflection Rate | 7.080 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.595 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Stock Diameter | 0.055 INCHES NOMINAL IN |
| Spring Length Under Load | 0.579 INCHES NOMINAL IN |
| Spring Solid Outside Diameter | 0.705 INCHES MINIMUM AND 0.735 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Bore Diameter | 0.750 INCHES NOMINAL IN |
| Material | STEEL COMP 302 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 |
|---|---|
| 10945 | Walker Spring and Stamping Corp (USA) |
| LC-055J-7SS PRIMARY | Lee Spring Company Llc (USA) |
| C0720-055-2000S PRIMARY | Barnes Group Inc (USA) |
| Reference | Meaning |
|---|---|
| 12293668-3 | 7/2 Vendor item drawing reference U S Army Tank Automotive Command Amsta-Im-Mm |
| 430434 | 5/9 Secondary reference Raytheon Technical Services Company |
| LC-055J-7SS | 5/9 Secondary reference U.S. Government activity |
NSN 5360-01-181-7550 is a Spring,helical,compression, manufactured by Lee Spring Company Llc, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-01-181-7550 has 3 manufacturer part numbers on file: 10945 (Walker Spring and Stamping Corp), LC-055J-7SS (Lee Spring Company Llc), C0720-055-2000S (Barnes Group Inc).
5 possible matches (shared part number, not a government interchangeability claim): 4320-01-298-9478, 5120-01-532-2344, 4140-01-686-3707. Verify interchangeability with system specifications before substitution.
Key specifications for LC-055J-7SS: Spring Free Outside Diameter: 0.705 INCHES MINIMUM AND 0.735 INCHES MAXIMUM IN; Load Rating: 8.120 POUNDS NOMINAL LBS; End Style: SPRING END,SQUARED AND GROUND BOTH ENDS; Spring Solid Length: 0.411 INCHES NOMINAL IN. 16 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.