The Spring,helical,extension, cataloged under National Stock Number 5360-00-370-2540, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Telemechanics Inc. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5360-00-370-2540 |
| Primary Part Number | 430550 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.728 INCHES NOMINAL IN |
| Load Rating | 68.800 POUNDS NOMINAL LBS |
| End Style | SHORT TWISTED HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Spring Free Length | 3.608 INCHES NOMINAL IN |
| Spring Deflection Rate | 86.000 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.480 INCHES NOMINAL IN |
| Spring Length Under Load | 3.730 INCHES NOMINAL IN |
| Coil Quantity | 18-1/4 |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Hook Radius | 0.240 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 |
|---|---|
| 430550 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 430550 | 5/9 Secondary reference American Telephone and Telegraph Co |
NSN 5360-00-370-2540 is a Spring,helical,extension, manufactured by Telemechanics Inc, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-370-2540 has 1 manufacturer part number on file: 430550 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-341-6513. Verify interchangeability with system specifications before substitution.
Key specifications for 430550: Spring Free Outside Diameter: 0.728 INCHES NOMINAL IN; Load Rating: 68.800 POUNDS NOMINAL LBS; End Style: SHORT TWISTED HOOK BOTH ENDS; Design Type: CLOSED. 12 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.