The Plate,mounting, cataloged under National Stock Number 5340-01-509-6867, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 7 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. 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 | 5340-01-509-6867 |
| Primary Part Number | 639509-4 |
| Item Name | Plate,mounting |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Mounting Hole Quantity | 2 |
| Length | 6.500 INCHES NOMINAL6.500 INCHES NOMINAL IN |
| Mounting Hole Diameter | 0.281 INCHES NOMINAL ALL HOLES IN |
| Shape | RECTANGULAR |
| Width | 1.000 INCHES NOMINAL1.000 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| Thickness | 0.125 INCHES NOMINAL0.125 INCHES NOMINAL IN |
| 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 |
|---|---|
| 639509-4 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5340-01-509-6867 is a Plate,mounting, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-509-6867 has 1 manufacturer part number on file: 639509-4 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-523-4833. Verify interchangeability with system specifications before substitution.
Key specifications for 639509-4: Mounting Hole Quantity: 2; Length: 6.500 INCHES NOMINAL6.500 INCHES NOMINAL IN; Mounting Hole Diameter: 0.281 INCHES NOMINAL ALL HOLES IN; Shape: RECTANGULAR. 7 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.