The Leaf,butt Hinge, cataloged under National Stock Number 5340-01-286-6230, 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 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-286-6230 |
| Primary Part Number | A51B20273-19 |
| Item Name | Leaf,butt Hinge |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Mounting Hole Quantity | 5 |
| Reversible Feature | NOT INCLUDED |
| Surface Treatment Document and Classification | MIL-P-23377 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Knuckle Inside Diameter | 0.093 INCHES NOMINAL IN |
| Style Designator | BUTT PARALLEL HOLES |
| Mounting Hole Diameter | 0.097 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN |
| Pin Center to Body Edge Distance | 0.625 INCHES NOMINAL IN |
| Hinge Pin | NOT INCLUDED |
| Material Thickness | 0.044 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN |
| Center to Center Distance Between Mounting Holes Along Length | 1.315 INCHES NOMINAL IN |
| End Knuckle Length | 0.380 INCHES NOMINAL IN |
| Surface Treatment | PLASTIC EPOXY AND PLASTIC POLYAMIDE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Knuckle Type | FRICTION |
| Performance Type | NOT RATED |
| 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 |
|---|---|
| A51B20273-19 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51B20273-19 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51B20273-19 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5340-01-286-6230 is a Leaf,butt Hinge, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-286-6230 has 1 manufacturer part number on file: A51B20273-19 (Northrop Grumman Systems Corporation).
Key specifications for A51B20273-19: Mounting Hole Quantity: 5; Reversible Feature: NOT INCLUDED; Surface Treatment Document and Classification: MIL-P-23377 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Knuckle Inside Diameter: 0.093 INCHES NOMINAL IN. 15 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.