The Bracket,double Angle, cataloged under National Stock Number 5340-01-239-5953, 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 21 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-239-5953 |
| Primary Part Number | A51L21091-27 |
| Item Name | Bracket,double Angle |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| First Leg Hole Diameter | 0.190 INCHES MINIMUM AND 0.196 INCHES MAXIMUM IN |
| First Leg Angle | 90.0 DEGREES NOMINAL |
| Center Section Thickness | 0.040 INCHES NOMINAL IN |
| Second Leg Relationship to First Leg | NOT IDENTICAL |
| Second Leg Angle | 90.0 DEGREES NOMINAL |
| Second Leg Hole Diameter | 0.257 INCHES MINIMUM AND 0.262 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | G+110AW09,CAGEC 26512 MFR REF SINGLE TREATMENT RESPONSE |
| Second Leg Length | 0.750 INCHES NOMINAL IN |
| First Leg Hole Arrangement Style | TWO HOLES |
| Style Designator | DOUBLE ANGLE |
| First Leg Style | CORNER RADIUS |
| Material Document and Classification | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE |
| Second Leg Distance Between First and Second Hole Centers Along Width | 1.375 INCHES NOMINAL IN |
| Second Leg Thickness | 0.040 INCHES NOMINAL IN |
| First Leg Thickness | 0.040 INCHES NOMINAL IN |
| First Leg Length | 0.750 INCHES NOMINAL IN |
| Second Leg Style | CORNER RADIUS |
| Surface Treatment | ENAMEL |
| Material | STEEL COMP 4130 |
| Second Leg Hole Arrangement Style | THREE HOLES |
| Mounting Hole Type | PLAIN |
| 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 |
|---|---|
| A51L21091-27 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51L21091-27 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51L21091-27 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 5340-01-239-5953 is a Bracket,double Angle, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-239-5953 has 1 manufacturer part number on file: A51L21091-27 (Northrop Grumman Systems Corporation).
Key specifications for A51L21091-27: First Leg Hole Diameter: 0.190 INCHES MINIMUM AND 0.196 INCHES MAXIMUM IN; First Leg Angle: 90.0 DEGREES NOMINAL; Center Section Thickness: 0.040 INCHES NOMINAL IN; Second Leg Relationship to First Leg: NOT IDENTICAL. 21 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.