The Plate,mounting, cataloged under National Stock Number 5340-01-557-0031, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-557-0031 |
| Primary Part Number | 12478346 |
| Item Name | Plate,mounting |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Length | 2.688 INCHES NOMINAL2.688 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A1008 ASSN STD SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.312 INCHES NOMINAL ALL HOLES IN |
| Shape | RECTANGULAR W/ONE ROUND END |
| Aperture Diameter | 1.080 INCHES NOMINAL IN |
| Width | 2.688 INCHES NOMINAL2.688 INCHES NOMINAL IN |
| Material | STEEL |
| Thickness | 0.119 INCHES NOMINAL0.119 INCHES NOMINAL IN |
| 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 |
|---|---|
| 12478346 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5340-01-557-0031 is a Plate,mounting, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-557-0031 has 1 manufacturer part number on file: 12478346 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12478346: Length: 2.688 INCHES NOMINAL2.688 INCHES NOMINAL IN; Material Document and Classification: ASTM A1008 ASSN STD SINGLE MATERIAL RESPONSE; Mounting Hole Diameter: 0.312 INCHES NOMINAL ALL HOLES IN; Shape: RECTANGULAR W/ONE ROUND END. 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.