Custom Brass Threaded Inserts Manufacturer & Supplier
Professional custom brass threaded inserts with high precision, diverse specs and reliable one-stop manufacturing service.

Material Grades: High-purity H59, H62, H65, and C3604 brass.
High Precision: CNC turned tolerances held to ±0.01mm.
Versatile Integration: Optimized for heat staking, ultrasonic, or molded-in.
Thread Standards: Metric, UNC, UNF, and BSW specifications.
Surface Finish: Options for nickel plating, tin plating, or natural finish.
Fast Turnaround: DFM feedback in 24h; prototype shipping in 3-7 days.
Scalable Production: 100% inspection for batches from 1 to 100,000+ pcs.
Product Overview & Machining Capabilities
Xiamen Dazao Machinery produces high-performance brass inserts designed for high-strength mechanical fastening in substrates including plastics, wood, and light metals. Unlike standard off-the-shelf fasteners, our custom brass threaded inserts are engineered via precision CNC machining service and thread rolling to ensure maximum torque-out and pull-out resistance.
By utilizing brass threaded inserts for metal and plastics, engineers can incorporate durable, reusable threads into low-density materials, significantly increasing the service life of the end-product. Our factory specializes in complex knurling patterns-including diamond, straight, and cross knurls-to provide superior mechanical anchoring in specialized industrial components.


Technical Specifications & Material Parameters
| Parameter | Specification Details |
| Available Materials | Brass H59, H62, H65, H68, H70, C3604, C36000 |
| Thread Sizes | M1.4 to M20 (Metric), #0 to 3/4" (Imperial/UNC/UNF) |
| Machining Process | CNC Turning, Automatic Lathe Machining, Thread Rolling |
| Dimensional Tolerance | Standard: ±0.05mm; Precision: ±0.01mm |
| Surface Roughness | Ra 0.4 to Ra 1.6 |
| Installation Methods | Ultrasonic, Heat Staking, Injection Molding, Cold Press-in |
| Secondary Finishing | Surface treatment (Natural, Nickel Plating, Tin Plating, Zinc Plating, Passivation) |
| Inspection Equipment | CMM, Thread Plug Gauges, Projector, Salt Spray Tester |
Customized Brass Inserts CNC Machining Process
People know the Brass Inserts for its superior strength, excellent machinability, and outstanding mechanical characteristics.
Dazao offers diverse CNC machining and metalworking services to produce components. Typical processing techniques encompass:





Features of Brass Inserts
High Purity Material: Made of premium brass (H62, H65) with excellent conductivity and corrosion resistance.
High Precision Threads: CNC machined threads (Metric, UNC, UNF) ensure smooth assembly and high pull-out resistance.
Strong Anchoring: Specialized knurling patterns (Diamond, Straight, Cross) provide superior torque-out resistance.
Multiple Installation: Suitable for heat staking, ultrasonic, and molded-in applications.
Durable Performance: Wear-resistant and anti-aging, reducing long-term maintenance costs.








Custom CNC Machined Brass Inserts Parts – Surface Finishing
Upgrade your Brass Inserts CNC parts with our surface finishes. We offer anodizing, polishing, and coating. These finishes improve corrosion resistance, protect against wear, and enhance appearance. This ensures long-lasting, high-performance parts.
· Chrome Plating · Blue Zinc Plated
· PVD · Electrophoresis
· Nickel Plating · As-Machined
· Multi-Color Anodized · Hard Anodizing
· Sandblasting · Anodizing
· Iron black Anodizing · Laser Carving
· Alodine · Passivation
· Etching · Brushed
· Black Oxide · Polishing
· Powder Coating · Spray Paint


Alodine

Anodizing

As-machined

Bead blasted

Black Oxide

Brushing

Electroplating

Polishing
CNC Machined Brass Inserts: 12 Quality Inspection Steps
Learn how Dazao's quality control team maintains high standards. They check the size and appearance of every order during production. Should any issues arise, we will promptly address and resolve them, or handle them according to your preferred method.

DFM Evaluation

Dimensional Tolerance Determination

Material Evaluation

CNC Machining Production

FQC Detection

SPC / CKP

Issue Detected

Problem Handling

Outgoing Quality Inspection

Surface Finishing

Comprehensive Inspection

Packaging

Adaptable Production Timeline
We tailor production timelines for different projects to guarantee we fulfill your brass inserts CNC machining parts requirements.
| Project Category | Completion Timeline |
| Immediate high-Accuracy Samples | 24-Hour Turnaround |
| CNC Brass Prototype Fabrication Basic Components | 1–3 days, Intricate Components: 3–7 days |
| Molding Specifications Mold Creation | Finished in 5 days, with samples provided within 7 days |
| High-Volume Production | Lead times for high-volume production depend on how complex the parts are. They usually range from 2 to 4 weeks. We consistently meet customer deadlines. |
For urgent projects, contact us promptly for accelerated processing.
Ordering Process for CNC Machined Brass Inserts

Submit Your CAD Design File
Upload your 2D or 3D designs directly. You can use IGS, PDF, or STEP formats. You can also give project details on the quotation page.. Ensure all submissions include a signed confidentiality agreement.

Quotation and DFM Evaluation
We will return the design within 12 hours for a manufacturability assessment and instant quotation.

Initiate Manufacturing
After the order is finalized, we will commence the manufacturing process according to your CAD blueprint.

Your Machined Parts Have Been Received
The aluminum prototype parts will be ready in a few days. We will send them to you using your chosen shipping method.
CNC Machining Workshop
Located in Tongan District, Xiamen, Fujian Province, China,has own factory cover an area of 3300 ㎡. Passed ISO9001:2015 & SGS in 2007. Passed ISO IATF 16949 in 2026.
We offer many services, including CNC turning, milling, die casting, stamping, and injection molding. We can use materials like stainless steel, aluminum, titanium, wood, plastics, and ceramics. We also provide surface treatments such as polishing, brushing, sandblasting, anodizing, PVD, DLC, and plating.
Dazao has over 100 skilled workers and more than 100 advanced machines. We offer customers a complete solution. This includes design, technical drawing support, manufacturing, assembly, and shipping.
Our commitment to quality is unwavering, from raw material to finished products, Dazao implements a strict quality control system. We fully inspect each product before shipping. This ensures the quality meets the highest standards. With our professional experience, many industries use our products.
Xiamen Dazao Machinery Co., Ltd. is your trusted partner in innovation and quality. We look forward to building a long-term business together and exceeding your expectations with our expertise and commitment.













Industrial Applications for Brass Inserts
Dazao's brass screw inserts are critical components in demanding environments where structural integrity is non-negotiable:

Electronics & IT
Threaded standoffs for PCB mounting and handheld device housings.

Automotive Systems
Inserts for intake manifolds, interior trim, and lighting assemblies.

Medical Devices
Durable threads for diagnostic equipment and laboratory instrument casings.

Industrial Automation
End-of-arm tooling (EOAT) components and sensor mounts.

Consumer Goods
High-strength fasteners for 3D printed parts and furniture hardware.

Plastic Industry
Injection molded parts, electronic plastic housings, and home appliances.
Assembly and Packaging Services for CNC Machined Brass Parts
We provide expert assembly and reliable packaging for CNC machined parts made from Brass. This ensures a precise fit, good performance, and safe delivery. We aim to maintain part quality and meet customer expectations.

Assembly
Below is the procedure for assembling Brass alloy components at the DAZAO CNC machining facility:
· Requirements Assessment – Validating the client's specifications, tolerances, and functional needs for each component.
· Component Examination – Evaluating each piece individually for dimensional precision, fit, alignment, and quality.
· Pre-assembly Organization – Arranging and preparing parts, fasteners, and sub-assemblies for the assembly process.
· Assembly Process – Joining screws, bolts, pins, or interlocking parts using either manual or automated techniques.
· Mid-assembly Inspection – Conducting fit and alignment checks during assembly to ensure proper mechanical and functional connections.
· Final Testing and Inspection – Ensuring that the assembled components comply with all performance, durability, and functional criteria.
· Packaging and Shipping – Securely packaging the assembled parts to prevent damage during transit.
This systematic approach guarantees the precision, functionality, and safe delivery of 7050 aluminum CNC components.
Packaged
For CNC machined components crafted from Brass alloy, we provide a range of packaging options. They carefully package and cushion each item. This prevents damage during shipping. It ensures that all parts arrive safely and in perfect condition.
Here are our packaging techniques for CNC Brass components:
· Bubble wrap – Offers cushioning to shield parts from scratches and minor impacts while in transit.
· Foam padding – Provides shock absorption for delicate or fragile items.
· Anti-static bags – Protects sensitive electronic components or coated parts from electrostatic discharge damage.
· Sturdy cardboard boxes – Delivers structural protection for assembled components, ensuring their security.
· Wooden crates – Delivers maximum protection for heavy, large, or fragile items during shipping.
· Shrink wrap – Keeps parts tightly bundled, clean, and safeguarded from dust or moisture.
These methods are often combined based on the size, material, and fragility of the components to guarantee safe delivery.

ISO 9001:2015 Certified Factory
DAZAO has received ISO 9001:2015, IATF 16949, and RoHS certifications. This ensures our brass alloy parts are high-quality, traceable, and reliable. These certifications demonstrate our commitment to precision, safety, and industry standards, giving our customers confidence in every custom part we deliver.
· ISO 9001: 2015
· IATF 16949: 2015
· ROHS Directive
· SGS Certifications
· 26 Patent Certifications
· Inspection report
· Full dimension report
· Material Test Report

FAQs About Brass Inserts CNC Machining

01.What is the MOQ for custom brass threaded inserts?
Dazao Machinery supports both prototyping and mass production. Our minimum order quantity (MOQ) starts at 1 piece for R&D projects. For mass production, we leverage high-speed automatic lathes to provide cost-effective solutions for batches exceeding 10,000 units.
02.Which brass grade is best for inserts used in plastics?
C3604 or H59 brass is typically recommended due to its excellent machinability and corrosion resistance. These grades allow for sharp, precise knurling patterns that ensure the brass inserts for plastics remain secure under high torque loads.
03.Can you provide brass threaded inserts for metal substrates?
04.What surface treatments do you offer for brass fasteners?
05.How do you ensure thread compatibility for international orders?
06.What file formats are required for a quotation?
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