The Spring,helical,extension, cataloged under National Stock Number 5360-01-154-2974, 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 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5360-01-154-2974 |
| Primary Part Number | 20574/300.16 |
| 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 | 0.301 INCHES NOMINAL IN |
| End Style | PLAIN CUT-OFF SECOND END |
| End Style | REDUCED SIDE LOOP FIRST END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | BS 1408 EN49,COND C,BRITISH STANDARDS INST MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 0.892 INCHES NOMINAL IN |
| Inside Diameter | 0.221 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL 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 |
|---|---|
| 20574/300.16 PRIMARY | Trident Maritime Systems Uk Limited (GBR) |
| Reference | Meaning |
|---|---|
| 20574/300.16 | 3/9 Design control — primary reference Aeronautical & General Instruments Limited |
NSN 5360-01-154-2974 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 5360-01-154-2974 has 1 manufacturer part number on file: 20574/300.16 (Trident Maritime Systems Uk Limited).
Key specifications for 20574/300.16: Spring Free Outside Diameter: 0.301 INCHES NOMINAL IN; End Style: PLAIN CUT-OFF SECOND END; End Style: REDUCED SIDE LOOP FIRST END; Design Type: CLOSED. 11 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.