The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-481-3420, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 3 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-481-3420 |
| Primary Part Number | B42008CPCP |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Material | COPPER ALLOY |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | S |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| B42008CPCP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| B42008 | 5/9 Secondary reference Dante Valve Company |
| D4200 ITEM 20 | D/9 Drawing number reference only Danco Valve Company |
| B42008CP | 3/1 Design control — primary reference Dante Valve Company |
| B42008 | 5/9 Secondary reference Danco Valve Company |
| B42008CP | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 5340-01-481-3420 is a Seat,helical Compression Spring, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-481-3420 has 1 manufacturer part number on file: B42008CPCP (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-593-1902. Verify interchangeability with system specifications before substitution.
Key specifications for B42008CPCP: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: SPRING, WASHER; Material: COPPER ALLOY; Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. 3 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.