The Clamp,block, cataloged under National Stock Number 5340-01-253-9909, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-253-9909 |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Mounting Hole Quantity | 22 |
| Clamping Hole Quantity | 2 |
| Distance From End to First Clamping Hole Center | 1.120 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTM A153 ASSN STD SINGLE TREATMENT RESPONSE OR MIL-P-23236,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE |
| Block Height | 0.880 INCHES NOMINAL0.880 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR |
| Material Document and Classification | QQ-S-741 FED SPEC SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.437 INCHES NOMINAL0.437 INCHES NOMINAL IN |
| Clamping Hole Diameter | 0.750 INCHES NOMINAL ALL HOLES IN |
| Cable Diameter for Which Designed | 0.500 INCHES NOMINAL ALL HOLES IN |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.310 INCHES NOMINAL0.310 INCHES NOMINAL IN |
| Distance From End to First Mounting Hole Center | 0.380 INCHES NOMINAL IN |
| Mounting Facility | UNTHREADED HOLE(S)UNTHREADED HOLE(S) |
| Center to Center Distance Between First and Second Mounting Holes | 2.560 INCHES NOMINAL2.560 INCHES NOMINAL IN |
| Surface Treatment | ZINC |
| Material | STEEL |
| Center to Center Distance Between First and Second Clamping Holes | 1.060 INCHES NOMINAL IN |
| 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 |
|---|---|
| 845-2445498 ASSY PD | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-253-9909 is a Clamp,block, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-253-9909: Mounting Hole Quantity: 22; Overall Height: 1.750 INCHES NOMINAL1.750 INCHES NOMINAL IN; Clamping Hole Quantity: 2; Distance From End to First Clamping Hole Center: 1.120 INCHES NOMINAL IN. 17 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.