The Plate,mounting, cataloged under National Stock Number 5340-01-312-7278, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-312-7278 |
| Primary Part Number | 5497650-19 |
| Item Name | Plate,mounting |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| Mounting Hole Quantity | 8 AND 4 |
| Length | 21.560 INCHES NOMINAL21.560 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | TT-P-1757 FED SPEC SINGLE TREATMENT RESPONSE |
| Material Document and Classification | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.374 INCHES MINIMUM AND 0.383 INCHES MAXIMUM FIRST HOLE IN |
| Mounting Hole Diameter | 1.190 INCHES NOMINAL ALL HOLES IN |
| Shape | SPECIAL |
| Aperture Diameter | 7.500 INCHES NOMINAL IN |
| Features Provided | APERTURE |
| Surface Treatment | CHROMATE ZINC |
| Width | 21.560 INCHES NOMINAL21.560 INCHES NOMINAL IN |
| Material | STEEL COMP 4130 |
| Thickness | 3.250 INCHES NOMINAL3.250 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 | S |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 6513352-1 | Naval Sea Systems Command (USA) |
| 5497650-19 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| 5497650-19 | Naval Sea Systems Command (USA) |
NSN 5340-01-312-7278 is a Plate,mounting, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-312-7278 has 3 manufacturer part numbers on file: 6513352-1 (Naval Sea Systems Command), 5497650-19 (Lockheed Martin Corporation Div Rotary and Mission Systems), 5497650-19 (Naval Sea Systems Command).
Key specifications for 5497650-19: Mounting Hole Quantity: 8 AND 4; Length: 21.560 INCHES NOMINAL21.560 INCHES NOMINAL IN; Surface Treatment Document and Classification: TT-P-1757 FED SPEC SINGLE TREATMENT RESPONSE; Material Document and Classification: MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE. 15 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.