The Spring,helical,extension, cataloged under National Stock Number 5360-01-141-9949, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Trident Maritime Systems Uk Limited. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-01-141-9949 |
| Primary Part Number | 20524/310.21 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Trident Maritime Systems Uk Limited |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.241 INCHES NOMINAL IN |
| End Style | OFSET HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.332 INCHES NOMINAL FIRST END IN |
| Opening Width | 0.472 INCHES NOMINAL SECOND END IN |
| Material Document and Classification | BS2056 EN58A,BRITISH STANDARDS INST MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 0.296 INCHES NOMINAL IN |
| Coil to Hook Inside Length | 0.156 INCHES NOMINAL FIRST END IN |
| Coil to Hook Inside Length | 0.128 INCHES NOMINAL SECOND END IN |
| Inside Diameter | 0.185 INCHES NOMINAL IN |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL OVERALL |
| Hook Radius | 0.100 INCHES NOMINAL SECOND END 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 |
|---|---|
| 20524/310.21 PRIMARY | Trident Maritime Systems Uk Limited (GBR) |
| Reference | Meaning |
|---|---|
| 20524/310.21 | 3/9 Design control — primary reference Aeronautical & General Instruments Limited |
NSN 5360-01-141-9949 is a Spring,helical,extension, manufactured by Trident Maritime Systems Uk Limited, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-01-141-9949 has 1 manufacturer part number on file: 20524/310.21 (Trident Maritime Systems Uk Limited).
Key specifications for 20524/310.21: Spring Free Outside Diameter: 0.241 INCHES NOMINAL IN; End Style: OFSET HOOK BOTH ENDS; Design Type: CLOSED; Style Designator: CYLINDRICAL. 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.