The Plate,mounting, cataloged under National Stock Number 5340-01-370-9989, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-370-9989 |
| Primary Part Number | 6551854 |
| Item Name | Plate,mounting |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Mounting Hole Quantity | 2 |
| Mounting Hole Diameter | 0.220 INCHES NOMINAL ALL HOLES IN |
| Shape | ROUND |
| Outside Diameter | 1.630 INCHES NOMINAL1.630 INCHES NOMINAL IN |
| Aperture Diameter | 0.745 INCHES NOMINAL IN |
| Features Provided | APERTURE |
| Thickness | 0.030 INCHES NOMINAL0.030 INCHES NOMINAL IN |
| Mounting Hole Type | UNTHREADED |
| Aperture Shape | ROUND |
| 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 |
|---|---|
| 6551854 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 510-5848-200 | 5/9 Secondary reference L3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division |
NSN 5340-01-370-9989 is a Plate,mounting, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-370-9989 has 1 manufacturer part number on file: 6551854 (Naval Sea Systems Command).
Key specifications for 6551854: Mounting Hole Quantity: 2; Mounting Hole Diameter: 0.220 INCHES NOMINAL ALL HOLES IN; Shape: ROUND; Outside Diameter: 1.630 INCHES NOMINAL1.630 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.