The Clamp,block,section, cataloged under National Stock Number 5340-01-383-8757, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-383-8757 |
| Primary Part Number | A51L20413-13 |
| Item Name | Clamp,block,section |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Mounting Hole Quantity | 22 |
| Clamping Hole Quantity | 22 |
| Distance From End to First Clamping Hole Center | 0.312 INCHES NOMINAL IN |
| Block Height | 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR |
| Mounting Hole Diameter | 0.190 INCHES MINIMUM AND 0.190 INCHES MINIMUM AND 0.196 INCHES MAXIMUM0.196 INCHES MAXIMUM IN |
| Clamping Hole Diameter | 0.094 INCHES MINIMUM AND 0.096 INCHES MAXIMUM FIRST HOLE IN |
| Clamping Hole Diameter | 0.094 INCHES MINIMUM AND 0.096 INCHES MAXIMUM SECOND HOLE IN |
| Clamping Hole Diameter | 0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM THIRD HOLE IN |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.188 INCHES NOMINAL0.188 INCHES NOMINAL IN |
| Distance From End to First Mounting Hole Center | 0.687 INCHES NOMINAL IN |
| Mounting Facility | UNTHREADED HOLE(S)UNTHREADED HOLE(S) |
| 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 |
|---|---|
| A51L20413-13 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51L20413-13 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51L20413-13 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 5340-01-383-8757 is a Clamp,block,section, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-383-8757 has 1 manufacturer part number on file: A51L20413-13 (Northrop Grumman Systems Corporation).
Key specifications for A51L20413-13: Mounting Hole Quantity: 22; Clamping Hole Quantity: 22; Distance From End to First Clamping Hole Center: 0.312 INCHES NOMINAL IN; Block Height: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN. 12 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.