The Spring,helical,extension, cataloged under National Stock Number 5360-01-522-5721, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-01-522-5721 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.405 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416, TYPE 1, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.030 INCHES MINIMUM AND 0.090 INCHES MAXIMUM BOTH ENDS IN |
| Spring Free Length | 1.440 INCHES MINIMUM AND 1.560 INCHES MAXIMUM IN |
| Spring Deflection Rate | 6.300 POUNDS PER INCH MINIMUM AND 7.700 POUNDS PER INCH MAXIMUM LBS |
| Coil to Hook Inside Length | 0.250 INCHES NOMINAL BOTH ENDS IN |
| Stock Diameter | 0.047 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL UNS K08500 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| LS14269-7MW-C | 3/2 Design control — primary reference U.S. Government activity |
NSN 5360-01-522-5721 is a Spring,helical,extension, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
Key specifications for 5360-01-522-5721: Spring Free Outside Diameter: 0.405 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416, TYPE 1, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: CYLINDRICAL; Opening Width: 0.030 INCHES MINIMUM AND 0.090 INCHES MAXIMUM BOTH ENDS IN. 11 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.