The Spring,helical,extension, cataloged under National Stock Number 5360-01-278-9723, 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 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-01-278-9723 |
| Primary Part Number | 12341665 |
| 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 | 0.620 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTM B663 ASSN STD ALL TREATMENT RESPONSES OVERALL |
| Load Rating | 19.00 POUNDS MINIMUM AND 20.00 POUNDS MAXIMUM LBS |
| End Style | SHORT TWISTED HOOK FIRST END |
| End Style | REDUCED HOOK SECOND END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.190 INCHES NOMINAL SECOND END IN |
| Material Document and Classification | ASTM A228 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 3.230 INCHES NOMINAL IN |
| Spring Deflection Rate | 18.700 POUNDS PER INCH NOMINAL LBS |
| Coil to Hook Inside Length | 0.450 INCHES NOMINAL FIRST END IN |
| Coil to Hook Inside Length | 0.490 INCHES NOMINAL SECOND END IN |
| Inside Diameter | 0.450 INCHES NOMINAL IN |
| Spring Length Under Load | 3.800 INCHES NOMINAL IN |
| Coil Quantity | 25-1/2 |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL UNS K08500 OVERALL |
| Hook Radius | 0.095 INCHES NOMINAL SECOND END 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 |
|---|---|
| 12341665 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 5592011-B | 5/9 Secondary reference Am General Llc |
NSN 5360-01-278-9723 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 5360-01-278-9723 has 1 manufacturer part number on file: 12341665 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12341665: Spring Free Outside Diameter: 0.620 INCHES NOMINAL IN; Surface Treatment Document and Classification: ASTM B663 ASSN STD ALL TREATMENT RESPONSES OVERALL; Load Rating: 19.00 POUNDS MINIMUM AND 20.00 POUNDS MAXIMUM LBS; End Style: SHORT TWISTED HOOK FIRST END. 20 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.