The Spring,helical,torsion, cataloged under National Stock Number 5360-00-708-6539, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Porta Drill Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-708-6539 |
| Primary Part Number | R563 |
| Item Name | Spring,helical,torsion |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Porta Drill Inc |
| Status | ACTIVE |
| Spring Free Outside Diameter | 8.250 INCHES NOMINAL IN |
| Style Designator | SINGLE TORSION LEFT HAND |
| Spring Free Length | 0.375 INCHES NOMINAL IN |
| Inside Diameter | 8.000 INCHES NOMINAL IN |
| Coil Quantity | 2-1/2 |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL OVERALL |
| End Angular Relationship | ENDS PARALLEL ONE TO OTHER |
| Hook Radius | 0.031 INCHES NOMINAL OVERALL IN |
| Hook Opening Width | 0.063 INCHES NOMINAL OVERALL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5360-00-708-6539 is a Spring,helical,torsion, manufactured by Porta Drill Inc, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-708-6539 has 2 manufacturer part numbers on file: 7086539 (U S Army Tank Automotive Command Amsta-Im-Mm), R563 (Porta Drill Inc).
3 possible matches (shared part number, not a government interchangeability claim): 2920-01-025-5632, 5935-01-122-0866, 6210-01-413-9870. Verify interchangeability with system specifications before substitution.
Key specifications for R563: Spring Free Outside Diameter: 8.250 INCHES NOMINAL IN; Style Designator: SINGLE TORSION LEFT HAND; Spring Free Length: 0.375 INCHES NOMINAL IN; Inside Diameter: 8.000 INCHES NOMINAL IN. 10 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.