The Spring,helical,extension, cataloged under National Stock Number 5360-00-303-5344, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 13 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-303-5344 |
| Primary Part Number | 8018653 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.535 INCHES NOMINAL IN |
| Load Rating | 28.000 POUNDS NOMINAL LBS |
| End Style | MACHINE LOOP BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | QQ-W-470A FED SPEC SINGLE MATERIAL RESPONSE OVERALL A |
| Spring Free Length | 1.430 INCHES NOMINAL IN |
| Spring Deflection Rate | 300.000 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.355 INCHES NOMINAL IN |
| Spring Length Under Load | 2.122 INCHES MINIMUM AND 2.128 INCHES MAXIMUM IN |
| Coil Quantity | 3-1/2 |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| 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 |
|---|---|
| 8018653 PRIMARY | Us Army Aviation and Missile Command (USA) |
NSN 5360-00-303-5344 is a Spring,helical,extension, manufactured by Us Army Aviation and Missile Command, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-303-5344 has 1 manufacturer part number on file: 8018653 (Us Army Aviation and Missile Command).
1 possible match (shared part number, not a government interchangeability claim): 1680-00-898-0330. Verify interchangeability with system specifications before substitution.
Key specifications for 8018653: Spring Free Outside Diameter: 0.535 INCHES NOMINAL IN; Load Rating: 28.000 POUNDS NOMINAL LBS; End Style: MACHINE LOOP BOTH ENDS; Design Type: CLOSED. 13 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.