The Ladder,vehicle Boarding, cataloged under National Stock Number 2540-01-644-5733, 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 19 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 | 2540-01-644-5733 |
| Primary Part Number | 12509864 |
| Item Name | Ladder,vehicle Boarding |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Crosspiece Length | 260.0 MILLIMETERS NOMINAL MM |
| Mounting Hole Quantity | 2 |
| Surface Treatment Document and Classification | MIL DTL 5541 MIL STD 1ST TREATMENT RESPONSE AND MIL DTL 53084 MIL STD 2ND TREATMENT RESPONSE AND MIL DTL 53039 MIL STD 3RD TREATMENT RESPONSE OR MIL DTL 64159 MIL STD 3RD TREATMENT RESPONSE AND DEF STD 595 FED STD 3RD TREATMENT RESPONSE |
| Design Type | STRAIGHT |
| Mounting Method | BOLTED |
| Heat Treatment | H-32 STRAIN HARDENED, STABILIZED TO 1/4 HARD AND T-6 SOLUTION HEAT TREATED, ARTIFICALLY AGED |
| Safety Shoes | NOT INCLUDED |
| Material Document and Classification | ASTM B209 ASSN STD 1ST MATERIAL RESPONSE AND ASTM B209 ASSN STD 2ND MATERIAL RESPONSE OR ASTM B221 ASSN STD 2ND MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Crosspiece Type and Quantity | 3 RUNG |
| Wheel | NOT PROVIDED |
| Attachment Hooks | NOT INCLUDED |
| Crosspiece Tread | INCLUDED |
| Surface Treatment | PRIMER-HEXAVALENT CHROMIUM FREE AND PRIMER-LEAD AND HEXAVALENT CHROMIUM FREE AND CARC (CHEMICAL AGENT RESISTANT COATING), ALIPHATIC POLYURETHANE OR POLYURETHANE PAINT-LEAD,CADMIUM AND HEXAVALENT CHROMIUM FREE |
| Tread Surface Type | NONSLIP |
| Side Rail Length | 998.4 MILLIMETERS NOMINAL MM |
| Protective Pads | NOT INCLUDED |
| Material | ALUMINUM ALLOY 5052 STEP |
| Material | ALUMINUM ALLOY 6061 RAIL SUPPORT |
| Mounting Hole Type | PLAIN AND THRU HOLE |
| 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 |
|---|---|
| 12509864 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 2540-01-644-5733 is a Ladder,vehicle Boarding, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
NSN 2540-01-644-5733 has 1 manufacturer part number on file: 12509864 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12509864: Crosspiece Length: 260.0 MILLIMETERS NOMINAL MM; Mounting Hole Quantity: 2; Surface Treatment Document and Classification: MIL DTL 5541 MIL STD 1ST TREATMENT RESPONSE AND MIL DTL 53084 MIL STD 2ND TREATMENT RESPONSE AND MIL DTL 53039 MIL STD 3RD TREATMENT RESPONSE OR MIL DTL 64159 MIL STD 3RD TREATMENT RESPONSE AND DEF STD 595 FED STD 3RD TREATMENT RESPONSE; Design Type: STRAIGHT. 19 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.