- zsdscrew.com
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【2】Size: 2 mm – 50 mm.
【3】Surface treatment: Natural color, passivated, customizable.
【4】Packaging methods: Bagged, Boxed, Cardboard box, Pallet.
【5】Execution standards: GB, DIN, ISO, ANSI, JIS, etc.
【6】Optional services: Customize、OEM/ODM、Testing (salt spray testing,etc)
Stainless steel cylindrical pins, commonly known as dowel pins, are precision fastening and positioning components used to accurately align and secure mechanical parts in assemblies. These pins are typically inserted into precisely machined holes to ensure consistent positioning between components such as machine housings, fixtures, molds, gears, and structural parts. Stainless steel cylindrical pins are widely used where dimensional accuracy, corrosion resistance, and reliable mechanical positioning are required.
ZSD Screw manufactures stainless steel cylindrical pins using precision cold drawing, centerless grinding, and strict dimensional inspection processes to ensure accurate diameter tolerance and smooth surface finish. Production follows internationally recognized dimensional standards such as DIN 6325 and ISO 8734. These standards define dimensional tolerances and installation requirements for cylindrical locating pins used in mechanical assemblies. Quality control includes dimensional measurement, surface finish inspection, and batch traceability to ensure consistent installation performance and positioning accuracy.
Standard cylindrical pin dimensions are produced according to DIN and ISO specifications. Custom sizes and special tolerance requirements can be manufactured according to customer drawings or equipment specifications.
Type: Cylindrical Pin / Dowel Pin
Diameter Range: 2 mm – 50 mm
Length Range: 6 mm – 200 mm
Standard: DIN 6325 / ISO 8734
Tolerance: According to standard specifications or customer drawings.
Materials Available: Stainless Steel 304 (A2)、Stainless Steel 316 / 316L (A4). Other corrosion-resistant stainless steel materials can be supplied upon request depending on service environment requirements.
Strength Grades: Cylindrical pins are positioning components and typically do not use conventional bolt strength classifications. Their mechanical performance is determined by material properties, dimensional tolerances, and manufacturing standards such as DIN 6325 and ISO 8734. For reference within general threaded fastening systems, carbon steel fasteners commonly use strength grades 4.8、8.8、10.9、12.9、14.9 according to ISO 898-1. ZSD Screw maintains controlled grinding processes and dimensional inspection to ensure stable positioning accuracy and reliable mechanical performance.
Surface Treatment: Stainless steel cylindrical pins generally rely on the inherent corrosion resistance of stainless alloys. Depending on application requirements, the following surface finishing processes may be applied: Passivation treatment、Electropolishing、Cleaning and protective oil treatment. Additional surface finishing or special treatments can be arranged according to environmental conditions or customer specifications.
Applications: In mechanical equipment manufacturing, stainless steel cylindrical pins are widely used for precise alignment of machine frames, mold components, fixture systems, gear housings, and transmission assemblies. Accurate dimensional tolerances allow reliable positioning between parts, helping maintain structural stability and repeatable assembly accuracy.
In electronic equipment and industrial electronics, cylindrical pins are commonly used in precision instruments, automation equipment, control systems, and actuator assemblies where accurate component positioning is critical. Their stable dimensional accuracy helps maintain alignment in compact electronic and mechanical assemblies.
In the new energy sector, stainless steel cylindrical pins are applied in photovoltaic equipment assemblies, inverter structures, battery module frames, and energy storage system mechanisms. Their corrosion resistance and precise positioning capability support reliable mechanical alignment in renewable energy equipment.
In conventional and renewable power generation facilities, cylindrical pins are used in turbine equipment, generator assemblies, pump housings, and auxiliary mechanical components where precise component alignment is required to maintain stable mechanical operation.
In the automotive and transportation industries, stainless steel cylindrical pins are used in engine components, transmission mechanisms, chassis assemblies, and precision mechanical fixtures. Accurate positioning ensures proper alignment between components and supports consistent performance under dynamic operating conditions.
In heavy industry and engineering equipment manufacturing, cylindrical pins are widely used in construction machinery, mining equipment, large mechanical assemblies, and industrial tooling systems. Their reliable positioning capability supports structural alignment and mechanical stability in demanding industrial environments.
Custom Fasteners Manufacturer: ZSD Screw specializes in manufacturing custom non-standard fasteners according to customer drawings and samples.We support: Special dimensions and tight tolerances. Special thread forms. High strength and special materials. Small batch and mass production. Our experienced engineers provide professional technical support from design to production.
Quality Control & Certifications: Quality is strictly controlled throughout the entire production process.Inspection includes: Raw material inspection. Dimensional measurement. Thread gauge inspection. Salt spray test. Torque test. Hardness testing. Tensile strength testing Certifications: ISO 9001. IATF 16949. EN standards. ASTM standards.
Why Choose ZSD Screw: More than 16 years manufacturing experience. Complete production process (cold heading, CNC machining, heat treatment) . Strong custom fastener capability. Stable quality and competitive factory price. The delivery time of the source factory is short and controllable. Professional technical services and long-term after-sales service.
Please send us your drawings or specifications. Our engineers will provide professional fastening solutions and quotations within 24 hours.
A: We are a certified source factory located in SuZhou, China, with 16+years of expertise. Unlike trading companies, we operate our own cold-heading and thread-rolling lines, offering you factory-direct pricing, total quality control, and transparent production timelines.
A: It represents the highest quality standard in the automotive industry. For you, this means Automotive-Grade precision, 100% batch traceability, and a "Zero Defect" management philosophy applied to every fastener we produce, regardless of your industry.
A: Absolutely. Customization is our core strength. Our engineering team works with CAD, SolidWorks, and 3D Step files. From specialized head types to complex multi-station parts, we provide a one-stop solution from rapid prototyping to mass production.
A: Beyond our IATF protocols, we utilize high-speed automated optical sorting machines. These systems inspect 100% of the batch for dimensional accuracy, thread integrity, and surface defects, ensuring we meet your strict PPM (Parts Per Million) requirements.
A: Yes. As an IATF-certified partner, we provide full PPAP Level 3 packages, including Control Plans, PFMEA, and ISIR. Every shipment is accompanied by a 3.1 or 3.2 Material Test Report to verify chemical and mechanical compliance.
A: For standard stock items, there is no MOQ—you can order by the box. For custom parts, the MOQ depends on the specifications. We offer free samples for quality evaluation (customer covers shipping), which can be fully refunded upon mass production orders.
A: Stock items are shipped within 24-72 hours. Standard production typically takes 20-30 days, while complex custom projects (including tooling) take 35-45 days. We provide a firm delivery commitment with every quotation.
A: Yes. We offer DDP services globally (USA, Europe, Southeast Asia, etc.). We handle all freight, customs clearance, and import duties, delivering the goods directly to your door so you can focus on your business without logistics headaches.