The Spring,helical,compression, cataloged under National Stock Number 5360-00-446-3596, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 10 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through both NSN and commercial part number lookups. 31 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-446-3596 |
| Primary Part Number | A18 |
| Item Name | Spring,helical,compression |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.750 INCHES NOMINAL IN |
| End Style | SPRING END,SQUARED AND GROUND BOTH ENDS |
| Style Designator | CYLINDRICAL |
| Spring Free Length | 1.625 INCHES NOMINAL IN |
| Spring Deflection Rate | 227.500 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.500 INCHES NOMINAL IN |
| Coil Quantity | 8-1/2 |
| Surface Treatment | CADMIUM OVERALL |
| Coil Helix Direction | RIGHT-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 |
|---|---|
| A18 PRIMARY | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| 186321PC9 | 5/9 Secondary reference U.S. Government activity |
| 189129PC449 | 5/9 Secondary reference Ingersoll Rand Co |
| 186291-453-9 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 188082PC600 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 186321PC9 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 189021PC449 | 5/9 Secondary reference U.S. Government activity |
| 186291-453-9 | 5/9 Secondary reference U.S. Government activity |
| 189021PC449 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 186291-453-9 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 187802PC366 | 5/9 Secondary reference Ingersoll Rand Co |
| 189129PC449 | 5/9 Secondary reference U.S. Government activity |
| 189129PC449 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 186321PC9 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 187682PC600 | 5/9 Secondary reference U.S. Government activity |
| 187954PC366 | 5/9 Secondary reference U.S. Government activity |
| 187802PC366 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 187954PC366 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 186321PC9 | 5/9 Secondary reference Ingersoll Rand Co |
| 186291-453-9 | 5/9 Secondary reference Ingersoll Rand Co |
| 187802PC366 | 5/9 Secondary reference U.S. Government activity |
NSN 5360-00-446-3596 is a Spring,helical,compression, manufactured by Ashcroft Inc Dba Heise, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-446-3596 has 1 manufacturer part number on file: A18 (Ashcroft Inc Dba Heise).
Key specifications for A18: Spring Free Outside Diameter: 0.750 INCHES NOMINAL IN; End Style: SPRING END,SQUARED AND GROUND BOTH ENDS; Style Designator: CYLINDRICAL; Spring Free Length: 1.625 INCHES NOMINAL IN. 10 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.