The Clamp,block,section, cataloged under National Stock Number 5340-01-284-4820, 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 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-284-4820 |
| Primary Part Number | A51L11078-27 |
| 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 | 33 |
| Mounting Hole Diameter | 0.190 INCHES MINIMUM AND 0.190 INCHES MINIMUM AND 0.196 INCHES MAXIMUM0.196 INCHES MAXIMUM IN |
| Clamping Hole Diameter | 0.188 INCHES MINIMUM AND 0.192 INCHES MAXIMUM FIRST HOLE IN |
| Clamping Hole Diameter | 0.188 INCHES MINIMUM AND 0.192 INCHES MAXIMUM SECOND HOLE IN |
| Clamping Hole Diameter | 0.250 INCHES MINIMUM AND 0.254 INCHES MAXIMUM THIRD HOLE IN |
| Mounting Facility | UNTHREADED HOLE(S)UNTHREADED HOLE(S) |
| Material | PLASTIC |
| 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 |
|---|---|
| A51L11078-27 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51L11078-27 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51L11078-27 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5340-01-284-4820 is a Clamp,block,section, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-284-4820 has 1 manufacturer part number on file: A51L11078-27 (Northrop Grumman Systems Corporation).
Key specifications for A51L11078-27: Mounting Hole Quantity: 22; Clamping Hole Quantity: 33; Mounting Hole Diameter: 0.190 INCHES MINIMUM AND 0.190 INCHES MINIMUM AND 0.196 INCHES MAXIMUM0.196 INCHES MAXIMUM IN; Overall Length: 2.035 INCHES NOMINAL2.035 INCHES NOMINAL IN. 8 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.