The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-398-9497, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-398-9497 |
| Primary Part Number | SJ3 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| Status | ACTIVE |
| First Step Diameter | 2.3750 INCHES NOMINAL IN |
| End Diameter | 1.3750 INCHES NOMINAL IN |
| Countersink Diameter | 0.1880 INCHES NOMINAL IN |
| Distance From End to First Step | 0.5000 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | MIL-B-16540,GRADE B MIL SPEC SINGLE MATERIAL RESPONSE |
| Bore Diameter | 0.6880 INCHES NOMINAL IN |
| Material | COPPER ALLOY 923 OR COPPER ALLOY 903 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| SJ3 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| Reference | Meaning |
|---|---|
| BS1195PC191 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
| BS1194PC191 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
NSN 5340-00-398-9497 is a Seat,helical Compression Spring, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-398-9497 has 1 manufacturer part number on file: SJ3 (Circor Naval Solutions Llc Dba Warren Pumps).
Key specifications for SJ3: Overall Height: 0.9380 INCHES NOMINAL IN; First Step Diameter: 2.3750 INCHES NOMINAL IN; End Diameter: 1.3750 INCHES NOMINAL IN; Countersink Diameter: 0.1880 INCHES NOMINAL IN. 9 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.