The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-476-8670, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Dante Valve Company. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: SE.
| Parameter | Value |
|---|---|
| NSN | 5340-01-476-8670 |
| Primary Part Number | B4023 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Dante Valve Company |
| Status | ACTIVE |
| Material | COPPER ALLOY |
| 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 | SE |
| Part Number | Manufacturer |
|---|---|
| B4023 PRIMARY | Dante Valve Company (USA) |
| D4000FF ITEM 20 | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| D4000FF ITEM 20 | 5/9 Secondary reference Danco Valve Company |
| D4023 | 5/9 Secondary reference Danco Valve Company |
| B4023 | 3/9 Design control — primary reference Danco Valve Company |
| B4023 | 5/9 Secondary reference Zf Industrieantriebe Witten Gmbh |
NSN 5340-01-476-8670 is a Seat,helical Compression Spring, manufactured by Dante Valve Company, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-476-8670 has 2 manufacturer part numbers on file: B4023 (Dante Valve Company), D4000FF ITEM 20 (Dante Valve Company).
Key specifications for B4023: Special Features: UNIT OF ISSUE SET CONSISTS OF 2 SPRING WASHERS.; End Item Identification: USED ON ANGLE RELIEF VALVE; Material: COPPER ALLOY. 1 specification is 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.