The Spring,helical,extension, cataloged under National Stock Number 5360-00-066-9552, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-066-9552 |
| Primary Part Number | G102-557 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.761 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Load Rating | 165.000 POUNDS MINIMUM LBS |
| End Style | SHORT TWISTED HOOK BOTH ENDS |
| Design Type | MAINSPRING |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 2.245 INCHES MINIMUM AND 2.295 INCHES MAXIMUM IN |
| Spring Deflection Rate | 250.000 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.498 INCHES NOMINAL IN |
| Stock Diameter | 0.137 INCHES MINIMUM AND 0.139 INCHES MAXIMUM IN |
| Spring Length Under Load | 2.930 INCHES MINIMUM IN |
| Coil Quantity | 10-1/4 |
| Surface Treatment | CADMIUM OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL UNS K08500 OVERALL |
| End Angular Relationship | ENDS ANGLED ONE TO OTHER |
| 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 |
|---|---|
| G102-557 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| G102-557 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
| G102-557 | 5/9 Secondary reference Vibra Con Associates Inc Dba Hawthorne Spring Co |
NSN 5360-00-066-9552 is a Spring,helical,extension, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-066-9552 has 1 manufacturer part number on file: G102-557 (Northrop Grumman Systems Corporation).
Key specifications for G102-557: Spring Free Outside Diameter: 0.761 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Load Rating: 165.000 POUNDS MINIMUM LBS; End Style: SHORT TWISTED HOOK BOTH ENDS. 17 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.