Dongguan Lanbo Electronics Technology Co., Ltd.

Custom CNC Turned Flange Head Smooth Shank Shoulder Bolt

Custom CNC Turned Flange Head Smooth Shank Shoulder Bolt
Part No :

Custom CNC Turned Flange Head Smooth Shank Shoulder Bolt 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 Flange Head Smooth Shank Shoulder Bolt
Manufacturing Process	CNC lathe turning, flat flange head forming, smooth shank precision finishing, external thread cutting, end face chamfering, precision deburring
Materials Available	Carbon steel, SUS304 / SUS316 stainless steel, C36000 brass; alloy steel available upon request
Surface Treatment	Natural machined finish, zinc plating, nickel plating, black oxide, passivation, mechanical polishing
Tolerance Standard	Dimensional tolerance ±0.01mm; precise smooth shank outer diameter fit tolerance; strict perpendicularity between flange face and shank axis; standard external thread fit accuracy; high coaxiality between flange, shank and thread section
Inspection Standards	Caliper & micrometer dimension measurement, thread go/no‑go gauge testing, perpendicularity & coaxiality geometric tolerance verification, surface finish & appearance inspection, all conducted under ISO quality management system
Customization Service	Custom overall length, shank diameter, flange size and thread specification according to customer 2D/3D drawings or physical samples; support prototype trial production, OEM & ODM mass‑volume orders

Inquiry now

Detailed description

Custom CNC Turned Flange Head Smooth Shank Shoulder Bolt

Our Custom CNC Turned Flange Head Smooth Shank Shoulder Bolt is a precision positioning fastener integrating flat flange limiting head, high-accuracy smooth shoulder shank and standard external thread end, designed for accurate locating, depth limiting and reliable locking assembly. As a professional CNC turning manufacturer based in Dongguan, we produce customized flange head shoulder bolts with ±0.01mm ultra-precise tolerance strictly following customers’ 2D & 3D engineering drawings. We support full OEM & ODM customization for total length, shank diameter, flange dimension and thread specification. These shoulder bolts are widely used for mold locating, fixture assembly, automation equipment connection and precision positioning in mold manufacturing, automation and precision machinery industries.

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

Flange head smooth shank shoulder bolt is a composite positioning fastener composed of flat flange head, precision smooth shoulder shank and threaded locking section. The integral flange head acts as a mechanical stop to precisely control assembly depth and provide enlarged supporting surface for stable load bearing; the smooth shoulder shank achieves high-precision clearance fit to ensure accurate positioning and guiding; the threaded end realizes reliable locking and fixation. It solves common industry pain points such as inconsistent assembly depth of ordinary bolts, insufficient positioning accuracy and limited supporting stress area. The integrally machined structure ensures stable positioning accuracy and reliable locking performance, effectively improving assembly precision and structural reliability for mold and fixture systems.

Our Product Service

We provide one-stop custom CNC turning service for flange head smooth shank shoulder bolts for global mold, fixture and automation equipment manufacturers. Our product scope covers custom shoulder bolts, positioning shoulder screws, stepped fasteners and other non-standard precision turned hardware. We complete full turning, flange head forming, smooth shank finishing, external thread cutting 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

Integral flange head for accurate depth limiting and stable support

The flat flange head is machined integrally with the shank in one clamping, serving as a reliable mechanical stop to precisely control insertion depth and ensure consistent assembly depth for each bolt. The enlarged flange surface provides larger supporting area and more uniform stress distribution, improving connection stability and load-bearing capacity under long-term stress.

High-precision smooth shoulder shank for accurate positioning

The smooth shoulder shank is finely turned with strict dimensional tolerance control up to ±0.01mm, achieving high-precision clearance fit with the mating hole. It ensures accurate positioning and smooth guiding during assembly, with excellent interchangeability, fully meeting the high-precision positioning requirements of molds, fixtures and automation equipment.

One-piece machined structure with high structural strength

The whole bolt is machined from solid metal bar stock without welding or splicing, featuring high structural strength and good fatigue resistance. It can maintain stable dimensional accuracy and mechanical performance under long-term vibration, repeated disassembly and load bearing, with long service life and low failure rate.

Diversified material and surface treatment options

Optional materials include carbon steel, stainless steel and brass to meet different requirements of strength, corrosion resistance and cost. Surface treatments such as zinc plating and nickel plating further enhance anti-rust and wear resistance, effectively extending the service life of the bolt in various working environments.

Full-parameter drawing-based customization

All key parameters including total length, shank diameter, flange size and thread specification 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 flange head smooth shank shoulder bolts and all kinds of precision CNC turned components. Available materials include carbon steel, SUS304/SUS316 stainless steel, C36000 brass and 6061‑T6 aluminum alloy, with sufficient bar stock to match different strength, corrosion resistance and weight requirements.
Our custom product range includes shoulder bolts, locating pins, connecting shafts, bushings, threaded fittings and other rotational precision machined parts. Selectable surface treatments: natural machined finish, zinc plating, nickel plating, passivation, black oxide 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 Flange Head Smooth Shank Shoulder Bolt is widely used in mold precise positioning and locking assembly, fixture connecting and locating fitting, automation equipment shoulder fastening, mechanical structure shoulder positioning connection, precision instrument assembly fastener and industrial hardware limiting and fixing 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.