The Spring,helical,extension, cataloged under National Stock Number 5360-00-309-0809, 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 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5360-00-309-0809 |
| Primary Part Number | 521522573 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.125 INCHES NOMINAL IN |
| Style Designator | CYLINDRICAL |
| Spring Free Length | 0.688 INCHES NOMINAL IN |
| Inside Diameter | 0.091 INCHES NOMINAL 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 |
|---|---|
| 152257 | Telemechanics Inc (USA) |
| 521522573 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 152257 | 5/9 Secondary reference American Telephone and Telegraph Co |
| 152257 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5360-00-309-0809 is a Spring,helical,extension, manufactured by Telemechanics Inc, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-309-0809 has 2 manufacturer part numbers on file: 152257 (Telemechanics Inc), 521522573 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 5310-00-654-4561. Verify interchangeability with system specifications before substitution.
Key specifications for 521522573: Spring Free Outside Diameter: 0.125 INCHES NOMINAL IN; Style Designator: CYLINDRICAL; Spring Free Length: 0.688 INCHES NOMINAL IN; Inside Diameter: 0.091 INCHES NOMINAL IN. 4 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.