The Spring,helical,compression, cataloged under National Stock Number 5360-00-257-2191, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Tyco Fire Products Lp. Government technical data includes 8 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 | 5360-00-257-2191 |
| Primary Part Number | S781 |
| Item Name | Spring,helical,compression |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Tyco Fire Products Lp |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.2385 INCHES NOMINAL IN |
| End Style | SPRING END,GROUND BOTH ENDS |
| Style Designator | CYLINDRICAL |
| Spring Free Length | 0.4375 INCHES NOMINAL IN |
| Inside Diameter | 0.1875 INCHES NOMINAL IN |
| Coil Quantity | 4-1/2 |
| Coil Helix Direction | LEFT-HAND |
| Material | COPPER ALLOY 511 OVERALL |
| 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 |
|---|---|
| S781 PRIMARY | Tyco Fire Products Lp (USA) |
NSN 5360-00-257-2191 is a Spring,helical,compression, manufactured by Tyco Fire Products Lp, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-257-2191 has 1 manufacturer part number on file: S781 (Tyco Fire Products Lp).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-262-1107. Verify interchangeability with system specifications before substitution.
Key specifications for S781: Spring Free Outside Diameter: 0.2385 INCHES NOMINAL IN; End Style: SPRING END,GROUND BOTH ENDS; Style Designator: CYLINDRICAL; Spring Free Length: 0.4375 INCHES NOMINAL IN. 8 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.