The Spring,helical,extension, cataloged under National Stock Number 5360-00-526-5530, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-526-5530 |
| Primary Part Number | 8741443 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.510 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| End Style | DOBBY HOOK FIRST END |
| End Style | REDUCED HOOK SECOND END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.343 INCHES NOMINAL FIRST END IN |
| Opening Width | 0.308 INCHES NOMINAL SECOND END IN |
| Material Document and Classification | QQ-W-428,TYP E 1 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-428,TYPE 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 1.836 INCHES NOMINAL IN |
| Spring Deflection Rate | 30.000 POUNDS PER INCH NOMINAL LBS |
| Coil to Hook Inside Length | 0.531 INCHES NOMINAL FIRST END IN |
| Coil to Hook Inside Length | 0.518 INCHES NOMINAL SECOND END IN |
| Inside Diameter | 0.380 INCHES NOMINAL IN |
| Coil Quantity | 9-1/4 |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| 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 |
NSN 5360-00-526-5530 is a Spring,helical,extension, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-526-5530 has 2 manufacturer part numbers on file: 2AL791 (Oshkosh Defense Llc), 8741443 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8741443: Spring Free Outside Diameter: 0.510 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL; End Style: DOBBY HOOK FIRST END; End Style: REDUCED HOOK SECOND END. 18 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.