The Clamp,block, cataloged under National Stock Number 5340-01-540-0721, 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 10 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 | 5340-01-540-0721 |
| Primary Part Number | 12486812 |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Mounting Hole Quantity | 22 |
| Clamping Hole Quantity | 22 |
| Surface Treatment Document and Classification | ASTM B633 TYPE II CLASS FE / ZN 25 OLIVE DRAB ASSN STD ALL TREATMENT RESPONSES |
| Material Document and Classification | ASTM A36/A36M PLATE HOT ROLLED 1.25 THK ASSN STD ALL MATERIAL RESPONSES |
| Mounting Hole Diameter | 0.656 INCHES NOMINAL0.656 INCHES NOMINAL IN |
| Clamping Hole Diameter | 0.531 INCHES NOMINAL SECOND HOLE IN |
| Specification/standard Data | 05047 - ASME Y14.-2000 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 05047 - ASME Y14.M-1994 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Mounting Facility | UNTHREADED HOLE(S)UNTHREADED HOLE(S) |
| Surface Treatment | CHROMATE ZINC |
| Material | STEEL |
| 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 |
|---|---|
| 12486812 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5340-01-540-0721 is a Clamp,block, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-540-0721 has 1 manufacturer part number on file: 12486812 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12486812: Mounting Hole Quantity: 22; Overall Height: 2.000 INCHES NOMINAL2.000 INCHES NOMINAL IN; Clamping Hole Quantity: 22; Surface Treatment Document and Classification: ASTM B633 TYPE II CLASS FE / ZN 25 OLIVE DRAB ASSN STD ALL TREATMENT RESPONSES. 10 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.