The Spring,helical,extension, cataloged under National Stock Number 5360-01-430-4720, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-01-430-4720 |
| Primary Part Number | 12440469 |
| 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 | 0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633,TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Load Rating | 5.840 POUNDS NOMINAL LBS |
| End Style | SHORT TWISTED HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | ASTM A227 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 4.380 INCHES MINIMUM AND 4.620 INCHES MAXIMUM IN |
| Spring Deflection Rate | 0.680 POUNDS PER INCH NOMINAL LBS |
| Coil to Hook Inside Length | 0.320 INCHES MINIMUM AND 0.380 INCHES MAXIMUM BOTH ENDS IN |
| Inside Diameter | 0.355 INCHES NOMINAL IN |
| Stock Diameter | 0.041 INCHES NOMINAL IN |
| Coil Quantity | 96 |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Coil Helix Direction | LEFT-HAND OR RIGHT-HAND |
| Material | STEEL UNS K06501 OVERALL |
| End Angular Relationship | ENDS PARALLEL ONE TO OTHER |
| Hook Radius | 0.175 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 |
|---|---|
| 12440469 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5360-01-430-4720 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 5360-01-430-4720 has 1 manufacturer part number on file: 12440469 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12440469: Spring Free Outside Diameter: 0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633,TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Load Rating: 5.840 POUNDS NOMINAL LBS; End Style: SHORT TWISTED HOOK BOTH ENDS. 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.