Dongguan Lanbo Electronics Technology Co., Ltd.

Custom CNC Turned Knurled Brass Insert Nut

Custom CNC Turned Knurled Brass Insert Nut
Part No :

Custom CNC Turned Knurled Brass 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 Knurled Brass Insert Nut
Manufacturing Process	CNC turning, external straight knurling, internal thread tapping, multi-circle anti-slip groove machining, deburring & chamfering
Materials Available	H59 / H62 Brass, C3604 free-cutting brass; optional SUS304/SUS316 stainless steel, copper alloy
Surface Treatment	Natural brass finish, tin plating, nickel plating, passivation, anti-tarnish coating (prevent brass oxidation & discoloration)
Tolerance Standard	Overall dimensional tolerance ±0.01mm; internal thread complies with ISO standard; outer diameter, knurl size & groove depth precise tolerance; surface roughness Ra1.6~Ra3.2
Inspection Standards	Full dimensional inspection via micrometer & thread gauge; thread fit test, knurl uniformity check, anti-pullout strength sampling test; FAI first article inspection report available
Customization Service	Custom inner thread size (Metric/UNC/UNF), outer diameter, total length, number of anti-retention grooves, knurl style; customizable materials, surface finishes and tolerance grades; OEM & ODM service based on 2D/3D drawings or physical samples

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Detailed description

Custom CNC Turned Knurled Brass Insert Nut

We are a professional precision CNC machining manufacturer based in Dongguan, China. We produce Custom CNC Turned Knurled Brass Insert Nuts with high precision tolerance up to ±0.01mm, fully customized according to customers’ 2D drawings, 3D files and physical samples.
This cylindrical embedded fastener is designed with vertical straight outer knurls and multiple annular locking grooves, equipped with standard internal threaded holes. It is mainly pre-embedded into plastic shells via injection molding or press fitting, delivering excellent anti-loosening and pull-out resistance. Widely used in consumer electronics, household appliances, plastic casings, toy accessories and automotive plastic components. We provide complete OEM & ODM customized solutions to meet diverse fastening demands for global industrial purchasers.

Introduction to CNC Lathe Turning Technology

CNC lathe turning is one of the most precise and efficient processing technologies for rotary metal parts applied in industrial automation and precision machinery. With programmable multi-axis turning equipment, metal bar stock is processed through cutting, boring, knurling, tapping and deburring under digital control.
Compared with traditional manual lathe processing, CNC precision turning guarantees stable dimensional accuracy within ±0.01mm, uniform surface texture and consistent quality in mass production. It is widely adopted to manufacture positioning pins, shaft sleeves, threaded inserts, bushings and various metal fasteners for molds, medical devices, electronic hardware and automated production equipment.
Combined with secondary machining functions, CNC lathes can complete knurling, groove cutting and thread processing at one time, perfectly satisfying the production requirements of precision embedded fasteners for plastic assembly.

What Is Knurled Brass Insert Nut & Its Industrial Functional Value

Knurled brass insert nut is a dedicated threaded fastener pre-buried inside plastic workpieces. Its core structural advantages are reflected in these aspects:
Vertical outer knurls increase friction between the nut and plastic matrix to effectively prevent circumferential rotation under torque;
Multiple annular retaining grooves lock tightly with plastic material after molding, greatly improving pull-out resistance and avoiding falling off during long-term use;
Brass material features good ductility, easy thread processing, excellent electrical conductivity and rust resistance; internal threads can repeatedly screw in bolts without thread sliding.
For electronic product casings, plastic structural parts and injection molding accessories, these embedded brass nuts are essential connecting components. Precise thread tolerance, unified outer diameter and standard groove depth are required to ensure stable assembly fit and long service life. Custom knurled brass threaded inserts have become standard customized hardware for plastic injection molding industries worldwide.

Custom Service Introduction for Knurled Brass Insert Nut

We offer one-stop CNC machining customization services for knurled brass insert nuts and various types of plastic embedded threaded inserts, cooperating with injection molding factories, electronics manufacturers and hardware trading companies around the world.
Our customizable product series includes: single-groove/double-groove/triple-groove anti-loosening brass inserts, straight knurl/cross knurl embedded nuts, metric/imperial thread insert nuts, miniature small-size nuts for precision electronics.
The whole production procedure covers CNC turning, outer surface knurling, internal thread tapping, anti-drop groove machining, edge deburring and anti-oxidation surface treatment. All processing parameters and standards are strictly implemented following your technical requirements. Besides single finished nuts, we can also support matched screw supporting customization for your one-stop procurement.

Core Advantages of Our Custom Knurled Brass Insert Nuts

Ultra-precise dimension & qualified thread matching

All nuts are processed by high-precision CNC lathes with full-process dimensional inspection. Outer diameter, overall length, thread pitch and groove depth maintain high consistency batch by batch; internal threads comply with international standards, ensuring smooth screwing without jamming or slipping threads.

Strong anti-rotation & anti-pullout performance

Uniform dense vertical knurls and multi-circle locking grooves form firm interlocking structure with plastic after injection molding, resisting torsion and pulling force effectively, solving the common loosening problem of plastic connection points.

Premium brass material with stable physical properties

Mainly adopt H59/H62 high-quality free-cutting brass, which is easy to machine, wear-resistant, non-magnetic and resistant to oxidation. It is lightweight yet tough, suitable for long-term use in indoor and mild humid environments. Optional stainless steel materials are available for harsh anti-corrosion scenarios.

Highly flexible personalized customization

We can adjust inner thread specification (Metric / UNC / UNF), outer diameter, total length, groove quantity and knurl type freely according to your needs. Surface anti-tarnish treatment, plating options and tolerance grades can all be tailored to your assembly conditions, lowering your secondary processing costs.

Stable production capacity & punctual delivery

Whether you need small batch prototype samples for testing or large-volume bulk orders, unified rigorous quality control standards are applied. Mature processing lines guarantee continuous supply, supporting long-term cooperative procurement plans for overseas merchants.

General OEM Customization Scope

We provide all-round tailored solutions for custom knurled brass insert nuts and all kinds of precision CNC turned fasteners.

Available raw materials: H59/H62 brass, C3604 free cutting brass, SUS304/SUS316 stainless steel, copper alloy, various bar diameters available to match your drawing demands.

Our processing range covers positioning pins, shaft sleeves, threaded inserts, press-in nuts, stepped shafts and all custom rotary precision metal parts. Optional surface treatments: natural brass finish, passivation, nickel plating, tin plating, anti-tarnish coating, polishing, to meet your requirements of anti-oxidation, anti-corrosion and appearance.

Service mode: Supply individual finished fasteners or matched component kits based on your production schedule. We formulate exclusive processing plans according to your 2D/3D drawings or physical samples, and arrange trial production before formal mass orders.

Main Application Scenarios

Our customized knurled brass insert nuts are extensively applied in the following fields:

Consumer electronic product plastic housings, household appliance internal structural parts, automotive plastic interior components, intelligent wearable devices, plastic toy accessories, medical plastic equipment, communication equipment casings and precision instrumentation plastic assemblies.

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.