The Armor,supplemental,small Arms-Fr, cataloged under National Stock Number 2540-01-644-3471, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 30 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 | 2540-01-644-3471 |
| Primary Part Number | 12578172 |
| Item Name | Armor,supplemental,small Arms-Fr |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Component Quantity | 1 |
| Mounting Hole Quantity | 14 |
| Document Type | ENGINEERING DRAWING |
| Color Chip Number | 33446 |
| Usage Design | FULL-TRACKED VEHICLE |
| Surface Treatment Document and Classification | FED STD 595 FED STD 2ND TREATMENT RESPONSE |
| Design Type | METAL |
| Mounting Position | REAR AND ROOF |
| Heat Treatment | TEMPERED |
| Overall Thickness | 0.250 INCHES NOMINAL IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | MIL DTL 12560 MIL SPEC SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.565 INCHES NOMINAL SECOND HOLE IN |
| Mounting Hole Diameter | 0.565 INCHES NOMINAL TENTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL EIGHTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL ELEVENTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL FIFTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL FIRST HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL FOURTEENTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL FOURTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL NINTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL SEVENTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL SIXTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL THIRD HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL THIRTEENTH HOLE IN |
| Mounting Hole Diameter | 0.690 INCHES NOMINAL TWELFTH HOLE IN |
| Shape | IRREGULAR |
| Component Document Origin | GOVERNMENT |
| Vehicle Identification Designator | M992A3 |
| Document Source | 19207 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 12578172 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 2540-01-644-3471 is a Armor,supplemental,small Arms-Fr, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
NSN 2540-01-644-3471 has 1 manufacturer part number on file: 12578172 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12578172: Component Quantity: 1; Mounting Hole Quantity: 14; Document Type: ENGINEERING DRAWING; Color Chip Number: 33446. 30 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.
NSN 2540-01-644-3471 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.