The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-596-5449, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5340-01-596-5449 |
| Primary Part Number | 3423-2001 ITEM 04D0 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION IAWMIL-STD-1622 OR MIL-STD-1330 AS DEEMED APPLICABLE. CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES. |
| 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 |
|---|---|
| 3423-2001 ITEM 04D0 | Naval Inventory Control Point Mechanicsburg (USA) |
| 3423-1014-1D0 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 3423-1014-1 | 3/1 Design control — primary reference Carleton Technologies Inc Div Tampa Facility |
| 3423-2001 ITEM 04 | 5/1 Secondary reference Carleton Technologies Inc Div Tampa Facility |
NSN 5340-01-596-5449 is a Seat,helical Compression Spring, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-596-5449 has 2 manufacturer part numbers on file: 3423-2001 ITEM 04D0 (Naval Inventory Control Point Mechanicsburg), 3423-1014-1D0 (Naval Inventory Control Point Mechanicsburg).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-633-7415, 5340-01-643-3355. Verify interchangeability with system specifications before substitution.
Key specifications for 3423-2001 ITEM 04D0: Part Name Assigned by Controlling Agency: SPRING SEAT; End Item Identification: MANIFOLD 10VL RED HIP 0 T 3000 PSI; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION IAWMIL-STD-1622 OR MIL-STD-1330 AS DEEMED APPLICABLE. CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES.. 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.