The Spring,helical,extension, cataloged under National Stock Number 5360-00-664-2174, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Honeywell Intl Inc Defense Avionics Systems. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-664-2174 |
| Primary Part Number | 721177-1 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Honeywell Intl Inc Defense Avionics Systems |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.171 INCHES NOMINAL IN |
| Load Rating | 0.230 POUNDS MINIMUM AND 0.270 POUNDS MAXIMUM LBS |
| End Style | RAISED HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.031 INCHES NOMINAL BOTH ENDS IN |
| Material Document and Classification | MIL-W-6101 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 0.437 INCHES NOMINAL IN |
| Inside Diameter | 0.125 INCHES NOMINAL IN |
| Spring Length Under Load | 0.187 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL OVERALL |
| Hook Radius | 0.062 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 |
|---|---|
| 721177-1 PRIMARY | Honeywell Intl Inc Defense Avionics Systems (USA) |
NSN 5360-00-664-2174 is a Spring,helical,extension, manufactured by Honeywell Intl Inc Defense Avionics Systems, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-664-2174 has 1 manufacturer part number on file: 721177-1 (Honeywell Intl Inc Defense Avionics Systems).
Key specifications for 721177-1: Spring Free Outside Diameter: 0.171 INCHES NOMINAL IN; Load Rating: 0.230 POUNDS MINIMUM AND 0.270 POUNDS MAXIMUM LBS; End Style: RAISED HOOK BOTH ENDS; Design Type: CLOSED. 14 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.