The Spring,helical,extension, cataloged under National Stock Number 5360-00-971-9137, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. 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. 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 | 5360-00-971-9137 |
| Primary Part Number | 570520 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.731 INCHES NOMINAL IN |
| Load Rating | 4.00 POUNDS NOMINAL LBS |
| End Style | EYE LOOP SECOND END |
| End Style | EXTENDED LOOP FIRST END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | AMS 5673 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 1.886 INCHES NOMINAL IN |
| Spring Deflection Rate | 27.400 POUNDS PER INCH NOMINAL LBS |
| Coil to Hook Inside Length | 0.800 INCHES NOMINAL FIRST END IN |
| Coil to Hook Inside Length | 0.374 INCHES NOMINAL SECOND END IN |
| Inside Diameter | 0.577 INCHES NOMINAL IN |
| Spring Length Under Load | 1.869 INCHES NOMINAL IN |
| Coil Quantity | 6-1/4 |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL COMP 631 OVERALL |
| Hook Radius | 0.120 INCHES NOMINAL SECOND END IN |
| Hook Radius | 0.090 INCHES NOMINAL FIRST 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 |
|---|---|
| 570520 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5360-00-971-9137 is a Spring,helical,extension, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-971-9137 has 1 manufacturer part number on file: 570520 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 5306-01-262-6313. Verify interchangeability with system specifications before substitution.
Key specifications for 570520: Spring Free Outside Diameter: 0.731 INCHES NOMINAL IN; Load Rating: 4.00 POUNDS NOMINAL LBS; End Style: EYE LOOP SECOND END; End Style: EXTENDED LOOP FIRST END. 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.