The Clamp,block, cataloged under National Stock Number 5340-01-251-4142, 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11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-251-4142 |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Mounting Hole Quantity | 22 |
| Clamping Hole Quantity | 11 |
| Block Height | 0.700 INCHES MINIMUM AND 0.700 INCHES MINIMUM AND 0.750 INCHES MAXIMUM0.750 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.334 INCHES MINIMUM AND 0.334 INCHES MINIMUM AND 0.354 INCHES MAXIMUM0.354 INCHES MAXIMUM IN |
| Center to Center Distance Between First and Third Mounting Holes | 1.500 INCHES NOMINAL1.500 INCHES NOMINAL IN |
| Clamping Hole Diameter | 0.834 INCHES MINIMUM AND 0.854 INCHES MAXIMUM ALL HOLES IN |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.435 INCHES MINIMUM AND 0.435 INCHES MINIMUM AND 0.455 INCHES MAXIMUM0.455 INCHES MAXIMUM IN |
| Distance From End to First Mounting Hole Center | 0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN |
| Mounting Facility | UNTHREADED HOLE(S)UNTHREADED HOLE(S) |
| Material | ALUMINUM |
| 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 |
|---|---|
| 44300-514 | 5/9 Secondary reference U.S. Government activity |
| 44300-514 | 3/9 Design control — primary reference Goodrich Corporation Dba Trw Lucas Aerospace |
NSN 5340-01-251-4142 is a Clamp,block, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-251-4142: Mounting Hole Quantity: 22; Overall Height: 1.400 INCHES MINIMUM AND 1.400 INCHES MINIMUM AND 1.500 INCHES MAXIMUM1.500 INCHES MAXIMUM IN; Clamping Hole Quantity: 11; Block Height: 0.700 INCHES MINIMUM AND 0.700 INCHES MINIMUM AND 0.750 INCHES MAXIMUM0.750 INCHES MAXIMUM 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.