Dongguan Lanbo Electronics Technology Co., Ltd.

Custom CNC Turned Straight Knurled Brass Threaded Insert Nut

Custom CNC Turned Straight Knurled Brass Threaded Insert Nut
Part No :

Custom CNC Turned Straight Knurled Brass Threaded Insert Nut product parameters

We offer full custom CNC turning services for non-standard precision components. We manufacture lathe parts strictly according to your CAD drawings, or provide engineering design support and production arrangements based on your specific requirements.

Item	Details
Product Name	Custom CNC Turned Straight Knurled Brass Threaded Insert Nut
Manufacturing Process	CNC lathe turning, straight knurling forming, internal thread tapping, end face chamfering, precision deburring
Materials Available	C36000 lead-free brass (standard), H59 / H62 brass, SUS304 stainless steel, carbon steel
Surface Treatment	Natural machined brass finish, mechanical polishing, nickel plating, tin plating, gold plating, passivation
Tolerance Standard	Dimensional tolerance ±0.01mm; precise internal thread fit tolerance; uniform straight knurling tooth profile; strict coaxiality between inner thread bore and outer knurled cylinder
Inspection Standards	Caliper & micrometer dimension measurement, thread go/no-go gauge testing, knurling profile & appearance inspection, coaxiality geometric tolerance verification, all conducted under ISO quality management system
Customization Service	Custom outer diameter, overall length, internal thread specification and knurling parameters according to customer 2D/3D drawings or physical samples; support prototype trial production, OEM & ODM mass-volume orders

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Detailed description

Custom CNC Turned Straight Knurled Brass Threaded Insert Nut

Our Custom CNC Turned Straight Knurled Brass Threaded Insert Nut is a precision embedded fastening component with full-body straight knurling and standard internal thread, specially designed for plastic injection molding assembly. As a professional CNC turning manufacturer based in Dongguan, we produce customized brass threaded inserts with ±0.01mm ultra-precise tolerance strictly following customers’ 2D & 3D engineering drawings. We support full OEM & ODM customization for outer diameter, total length, thread specification and knurling parameters. These brass knurled inserts are widely adopted for embedded fastening, threaded reinforcement and structural connection in electronic enclosures, household appliances and automotive plastic parts.

Introduction to CNC Lathe Turning Technology

CNC lathe turning is one of the most precise and efficient manufacturing methods for rotational metal components used in industrial automation and precision equipment. Using programmable multi‑axis turning centers, metal bars are processed through continuous cutting, facing, grooving, threading and boring with computer‑controlled accuracy.
Compared with manual machining and conventional milling, precision CNC turning achieves stable dimensional tolerance down to ±0.01mm, smooth surface quality and outstanding consistency during mass production. It is widely applied to fabricate pins, shafts, bushings, connectors and threaded parts for mold, electronics, medical, automotive and automation machinery.
Equipped with secondary milling and cutting capacity, CNC turning supports complex customized profiles including stepped cylinders, grooved structures and multi‑sided profiles, satisfying diversified precision positioning component demands for industrial equipment.

Product Definition & Industrial Value

Straight knurled brass threaded insert nut is an embedded cylindrical fastening fitting designed to be pre-installed in plastic parts via injection molding. The straight knurling on the outer surface forms strong mechanical interlock with plastic material after molding, providing excellent anti-torsion and anti-pull performance, while the precision internal thread offers stable threaded fastening interface. It solves common industry pain points such as low thread strength of direct tapping on plastic, easy thread stripping and short service life under repeated disassembly. Leveraging brass’s advantages of excellent conductivity, corrosion resistance and good machinability, it greatly improves fastening reliability and service life of plastic structural parts.

Our Product Service

We provide one-stop custom CNC turning service for straight knurled brass threaded insert nuts for global electronics, household appliance and automotive parts suppliers. Our product scope covers various brass embedded inserts, injection molding threaded nuts and other non-standard precision turned hardware. We complete full turning, straight knurling forming, internal thread tapping and deburring strictly based on customer engineering drawings. Value-added services include diversified surface treatment, full-dimension inspection, prototype sampling and large-batch OEM production.

5 Core Advantages

Uniform straight knurling anti-torsion structure

The full-body straight knurling is formed by precision CNC knurling process, with uniform tooth profile and consistent depth. After being embedded in plastic, it forms firm mechanical interlock, effectively resisting torsion and pulling force, and preventing the insert from rotating or falling off during screw tightening and long-term use.

High-quality brass base material with comprehensive performance

Adopting high-grade lead-free brass as standard material, it features excellent electrical and thermal conductivity, good corrosion resistance and superior machinability. It maintains stable performance in conventional working environments, and is especially suitable for electronic and electrical plastic parts with conductive or heat dissipation requirements.

High-precision coaxial internal thread

The internal thread is tapped with one-time clamping, with accurate pitch and tooth profile, and strict coaxiality control with the outer knurled cylinder. The dimensional tolerance can reach ±0.01mm, ensuring smooth screw assembly, avoiding jamming or thread slipping, and meeting the requirements of repeated disassembly and assembly.

Injection molding friendly design

The end face is chamfered properly, which is convenient for positioning and placing in the injection mold, and avoids scratching the mold cavity. The reasonable knurling depth and outer diameter tolerance match the injection molding process parameters, ensuring stable embedding quality and high molding yield.

Full-parameter drawing-based customization

All key parameters including outer diameter, total length, thread standard and knurling specifications can be fully adjusted according to your 2D/3D drawings or physical samples. We accept both small-batch prototype verification orders for new product development and large-volume mass production orders for formal projects.

OEM Custom Service Range

We provide comprehensive customized solutions for custom straight knurled brass threaded insert nuts and all kinds of precision CNC turned components. Available materials include C36000 lead-free brass, H59/H62 brass, SUS304/SUS316 stainless steel and carbon steel, with sufficient bar stock to match different conductivity, strength and corrosion resistance requirements.
Our custom product range includes threaded inserts, embedded nuts, connecting sleeves, locating pins, bushings and other rotational precision machined parts. Selectable surface treatments: natural machined finish, mechanical polishing, nickel plating, tin plating, gold plating, passivation and anodizing.
We can supply single parts or matched hardware kits according to assembly needs. Custom machining will be developed based on your drawings or samples. Small batch prototype testing is available before formal mass production.

Typical Application Scenarios

Our Custom CNC Turned Straight Knurled Brass Threaded Insert Nut is widely used in electronic plastic enclosure fastening, household appliance plastic part assembly, automotive interior plastic components, injection mold embedded fastening, communication equipment plastic structure and consumer electronics hardware embedding assembly.

Frequently Asked Questions

FAQ 1

Q: Can you produce custom CNC turned parts according to my drawings or samples?
A: Yes, we mainly focus on OEM & ODM customized precision turning services. We accept 2D files like PDF/DWG and 3D files such as STEP, IGES. You can also send physical samples for us to reverse-engineer and optimize the structure. Our engineering team will review your design and offer professional suggestions on cost saving and manufacturability (DFM) for free.

FAQ 2

Q: What kinds of metal materials can you use for CNC turning processing?
A: We support a full range of common precision machining metals, including SUS304/SUS316 stainless steel, 1018/1045 carbon steel, 6061/7075 aluminum alloy, C36000 brass, copper and titanium. We can select suitable raw materials based on your product usage, working environment, strength requirements and budget.

FAQ 3

Q: Can I get trial samples before mass production? How long is the sample lead time?
A: Trial samples are available for all customized turning orders. The sample production cycle is 3–7 working days after drawing confirmation. After you test and confirm the sample quality and dimensions, we will arrange mass production. Small batch trial orders are also acceptable if you do not need large volume at first.

FAQ 4

Q: What surface finishing options do you provide for CNC turned metal parts?
A: We offer multiple surface treatments to meet anti-rust, anti-corrosion, wear resistance and appearance demands: passivation, electropolishing, zinc plating, nickel plating, black oxide, powder coating, anodizing for aluminum, sandblasting and polishing. If your products are exported to Europe, we can provide surface treatment that complies with RoHS and REACH standards.

FAQ 5

Q: How do you control the dimensional tolerance of precision CNC turned parts?
A: Our standard tolerance for general turned parts is ±0.01mm, and ultra-precision components can achieve ±0.005mm with grinding processes. We carry out strict three-step quality inspection: IQC for raw material incoming check, IPQC for in-process production monitoring, and FQC full dimension testing before shipment. We provide inspection reports and accept third-party quality inspection as requested.

About our company

Dongguan Lanbo Electronic Technology Co., Ltd. (Brand: LAMBOOR) was established in 2010 with 15 years of experience in precision hardware manufacturing. We own a 3,000 sq.m standardized factory and employ over 100 professional technicians, acting as an integrated one-stop manufacturer specializing in custom precision hardware structural components, covering mold development, stamping, sheet metal, CNC turning, welding and dust-free assembly.

We are fully equipped with Jinfeng/Aomate stamping machines, laser cutting machines, CNC bending machines, together with complete QC testing equipment including 2D projectors, salt spray testers and tensile testers. Certified to ISO9001:2015, we hold multiple utility model patents for hardware molds.

Our products are widely applied in consumer electronics, optical communication, medical devices, automotive and new energy electrical industries, with more than 400 customized projects completed. We maintain long-term partnerships with renowned enterprises including KYOCERA, Foxconn and RICOH.

63% of our annual RMB 30 million revenue comes from overseas exports. Our self-developed progressive mold technology cuts processing costs by 80%. We support rapid prototyping and mass production, delivering stable, cost-effective customized hardware solutions for global clients.