The Spring,helical,extension, cataloged under National Stock Number 5360-00-345-5437, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms. Government technical data includes 13 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 | 5360-00-345-5437 |
| Primary Part Number | 205A939P1 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.500 INCHES NOMINAL IN |
| End Style | RAISED HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.125 INCHES NOMINAL BOTH ENDS IN |
| Material Document and Classification | QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 1.470 INCHES NOMINAL IN |
| Inside Diameter | 0.405 INCHES NOMINAL IN |
| Coil Quantity | 16 |
| Surface Treatment | PASSIVATE OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL COMP 302 OVERALL |
| Hook Radius | 0.202 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 |
|---|---|
| 205A939P1 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
NSN 5360-00-345-5437 is a Spring,helical,extension, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-345-5437 has 1 manufacturer part number on file: 205A939P1 (Lockheed Martin Corporation Div Rms).
Key specifications for 205A939P1: Spring Free Outside Diameter: 0.500 INCHES NOMINAL IN; End Style: RAISED HOOK BOTH ENDS; Design Type: CLOSED; Style Designator: CYLINDRICAL. 13 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.