The Spring,helical,extension, cataloged under National Stock Number 5360-00-316-4458, 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 - Mitchel Field. Government technical data includes 12 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 | 5360-00-316-4458 |
| Primary Part Number | 120144 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.531 INCHES NOMINAL IN |
| End Style | MACHINED HALF LOOP BOTH ENDS |
| Design Type | OPEN |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.062 INCHES NOMINAL BOTH ENDS IN |
| Spring Free Length | 2.659 INCHES NOMINAL IN |
| Inside Diameter | 0.435 INCHES NOMINAL IN |
| Coil Quantity | 25 |
| Surface Treatment | NICKEL OVERALL |
| Coil Helix Direction | LEFT-HAND |
| Material | STEEL OVERALL |
| Hook Radius | 0.156 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 |
|---|---|
| 120144 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
NSN 5360-00-316-4458 is a Spring,helical,extension, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-316-4458 has 1 manufacturer part number on file: 120144 (Lockheed Martin Corporation Div Rms - Mitchel Field).
1 possible match (shared part number, not a government interchangeability claim): 6145-01-616-8862. Verify interchangeability with system specifications before substitution.
Key specifications for 120144: Spring Free Outside Diameter: 0.531 INCHES NOMINAL IN; End Style: MACHINED HALF LOOP BOTH ENDS; Design Type: OPEN; Style Designator: CYLINDRICAL. 12 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.