The Clamp,block,section, cataloged under National Stock Number 5340-01-421-2789, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-421-2789 |
| Item Name | Clamp,block,section |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Mounting Hole Quantity | 2 |
| Clamping Hole Quantity | 2 |
| Surface Treatment Document and Classification | MIL-C-5541,CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A |
| Block Height | 0.440 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR |
| Material Document and Classification | QQ-A-200/8 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-250/11,6061-T6 FED SPEC 2ND MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.281 INCHES NOMINAL IN |
| Distance From Center of Mounting Hole to Edge Along the Width | 1.530 INCHES NOMINAL IN |
| Distance From End to First Mounting Hole Center | 1.130 INCHES NOMINAL IN |
| Surface Treatment | CHROMATE |
| Material | ALUMINUM ALLOY 6061 |
| 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 |
| Reference | Meaning |
|---|---|
| A3209870 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-421-2789 is a Clamp,block,section, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-421-2789: Mounting Hole Quantity: 2; Clamping Hole Quantity: 2; Surface Treatment Document and Classification: MIL-C-5541,CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE A; Block Height: 0.440 INCHES NOMINAL IN. 11 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.