The Spring,helical,extension, cataloged under National Stock Number 5360-00-972-8581, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5360-00-972-8581 |
| Primary Part Number | A457-546 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.250 INCHES NOMINAL IN |
| Load Rating | 1.620 POUNDS NOMINAL LBS |
| End Style | EXTENDED LOOP BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | MIL-W-17481,COND B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 2.439 INCHES NOMINAL IN |
| Spring Deflection Rate | 2.500 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.186 INCHES NOMINAL IN |
| Spring Length Under Load | 2.656 INCHES NOMINAL IN |
| Coil Quantity | 50 |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL COMP 316 OVERALL |
| Hook Radius | 0.109 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 |
|---|---|
| A457-546 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| Reference | Meaning |
|---|---|
| A547-546 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
| 547A002987 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 002987 | C/1 Advisory reference — outside the item-of-supply concept L3 Technologies, Inc. Div L3 Keo |
NSN 5360-00-972-8581 is a Spring,helical,extension, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-972-8581 has 1 manufacturer part number on file: A457-546 (L3 Technologies, Inc. Div L3 Keo).
1 possible match (shared part number, not a government interchangeability claim): 6150-01-562-5900. Verify interchangeability with system specifications before substitution.
Key specifications for A457-546: Spring Free Outside Diameter: 0.250 INCHES NOMINAL IN; Load Rating: 1.620 POUNDS NOMINAL LBS; End Style: EXTENDED LOOP 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.