Two-Lug Self-Locking Fixed Anchor Nut — Technical Structure Version
Confirmed Structural Features
Two-Lug Mounting Plate
The base plate extends on both sides of the threaded boss to form two mounting lugs. The two-point layout helps locate the nut and resist rotation after installation when the lugs are secured correctly.
Two Mounting Holes
Each lug contains one visible circular hole. These holes are intended to accept the project-specified attachment method. The image alone does not establish the hole diameter, rivet specification, mounting fastener or whether another approved installation process is required.
Central Threaded Boss
A raised cylindrical boss at the center contains the female thread. Its projection provides the thread engagement length defined by the final design while keeping the nut captive on the supporting structure.
Fixed Configuration
The product is described as a fixed anchor nut. Unlike a floating nutplate, the threaded element is intended to remain in a defined position relative to the mounting plate. Hole alignment and installation accuracy are therefore important.
Product Specification Status
Item | Confirmed or required status |
|---|
Product name | Two-Lug Self-Locking Fixed Anchor Nut |
General type | Fixed, two-lug captive anchor nut |
Visible structure | Two mounting lugs, two circular mounting holes, central threaded boss |
Self-locking feature | Included in the supplied product name; mechanism and performance require confirmation |
Thread specification | Not provided; confirm diameter, pitch, class and thread system |
Material | Not provided; specify on the RFQ or drawing |
Surface treatment | Not provided; visual color is not sufficient to identify a coating |
Standard | Not provided; confirm the applicable standard, drawing or part number |
Dimensions | Not provided; dimensional drawing required |
Mechanical properties | Not provided; specify required proof load and thread strength |
Mounting method | Confirm approved rivets, fasteners or other installation process |
Prevailing torque | Not provided; confirm test method, limits and reuse cycles |
How the Fixed Anchor Nut Works
The two mounting lugs secure the plate to the supporting structure and prevent the nut from rotating when the mating bolt is tightened or removed. The central female thread receives the bolt and transfers clamp load into the mounted nutplate and surrounding structure.
If the specified product uses a prevailing-torque self-locking design, resistance to rotation is generated within the thread system rather than by relying solely on clamp load. The precise method may involve a controlled thread deformation or another design defined by the product specification. Because this mechanism cannot be determined reliably from the image, it should be verified before publishing a technical claim or setting assembly torque.
Installation Principle
Confirm the part number, drawing, thread and installation method.
Prepare the panel or bracket holes according to the approved hole pattern.
Position the anchor nut on the specified side of the structure.
Align the central thread with the bolt-access hole.
Align both lug holes with the prepared mounting holes.
Secure the two lugs using the specified rivets or approved mounting fasteners.
Check that the plate is seated correctly and cannot rotate.
Verify that the thread is clean, aligned and free from installation damage.
Insert the specified mating bolt from the accessible side.
Tighten using the torque procedure approved for the complete joint.
Do not select a rivet or installation fastener from appearance alone. Hole diameter, grip length, head style, material compatibility and installation force must match the drawing.
The self-locking designation indicates that the threaded joint is intended to provide additional resistance to bolt rotation under vibration or repeated service loading. This can help maintain joint security where an ordinary free-running nut may require a separate locking device.
The following values must be confirmed for the exact part:
initial prevailing torque;
maximum prevailing torque;
torque after repeated installation cycles;
bolt material and finish used for testing;
installation torque;
operating temperature range;
lubrication restrictions;
minimum thread engagement;
proof-load or tensile requirements;
replacement criteria.
A self-locking feature does not replace correct joint design, bolt preload, mounting integrity or inspection.
Typical Application Scenarios
Subject to engineering approval, this product type may be considered for:
thin panels where a loose nut is difficult to access;
enclosed housings and equipment covers;
machinery guards and removable access panels;
vehicle, rail or transportation assemblies;
electrical and electronic enclosures;
industrial equipment brackets;
sheet-metal structures;
maintenance points requiring repeated bolt removal;
assemblies that need a captive threaded component;
vibration-sensitive joints requiring a defined self-locking feature.
The application examples do not establish compliance with aerospace, automotive or other regulated standards.
Material and Surface Treatment
No material grade or coating specification has been supplied. The yellow-iridescent appearance in the image is only a visual observation and must not be used to identify the substrate or surface treatment.
For procurement, specify:
base material and grade;
heat treatment, if required;
surface-treatment process;
coating thickness or performance requirement;
corrosion-resistance test;
hydrogen-embrittlement controls where applicable;
electrical conductivity or grounding requirement;
restrictions on hazardous substances;
compatibility with the panel, bolt and installation fasteners.
Quality Inspection Points
A technical purchase specification may include:
dimensional inspection against the approved drawing;
thread go/no-go gauging;
lug-hole position and diameter checks;
flatness and boss-alignment inspection;
mounting test on a representative panel;
prevailing-torque testing;
proof-load testing;
coating thickness or corrosion testing;
visual inspection for cracks, burrs and deformation;
lot marking and traceability review.
Only inspection items agreed before production should be considered part of the supply scope.
FAQ
Is this a fixed or floating anchor nut?
The supplied name and visible one-piece layout identify it as a fixed anchor nut. It should not be substituted for a floating nutplate unless the drawing permits the change.
How is it attached to the panel?
The image shows two mounting holes, but the exact attachment method has not been provided. Use the rivets, fasteners or installation process stated on the approved drawing.
What creates the self-locking action?
The exact mechanism is not confirmed by the image. Obtain the manufacturer’s technical data or the governing standard before describing the locking method.
What material and finish are available?
They have not been specified. State the required material, coating and corrosion performance in the inquiry.
Which standard does this product meet?
No standard number has been provided. Supply should be controlled by an agreed standard, customer drawing or verified part number.
Request a Technical Quotation
For an accurate quotation, provide the thread specification, dimensional drawing, mounting-hole pattern, material, surface treatment, self-locking torque requirements, proof load, installation method, quantity, documentation and application environment.
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