Precision CNC Turning and Surface Finishing for Custom 316L Fasteners in Automation Systems
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CNC Machining of Non-Standard Fasteners: Precision Threading for Automation Reliability
Custom fasteners in automation systems must deliver repeatable mechanical integrity under dynamic loads, thermal changes, and vibration. These non-standard components often feature specific geometries, thread designs, or head shapes tailored to unique system constraints. At Neway, we manufacture custom fasteners from 316L stainless steel using CNC turning technology optimized for automation equipment applications.
By integrating advanced surface treatments—passivation and PVD coating—we provide high-performance fastening solutions that exceed industrial durability and cleanliness standards.
Why 316L Stainless Steel Is Used for Custom Automation Fasteners
Superior Corrosion Resistance and Strength
316L stainless steel offers excellent resistance to corrosion, even in the presence of industrial fluids and wash-down environments. Its low carbon content prevents sensitization, and the alloy meets ISO 3506 and ASTM F138 standards for mechanical fasteners in corrosive and cleanroom settings.
High Machinability for Complex Thread Profiles
Despite being more difficult to cut than 304, 316L can be precisely machined using sharp carbide tools and optimized speeds. Our turning centers produce accurate thread forms (UNC/UNF, metric, or special) with pitch diameters held within ±0.02 mm and surface finish Ra ≤ 1.6 µm for thread flanks.
CNC Turning Process for Custom Fasteners
Precision Thread Turning and Profile Control
Custom fasteners are CNC turned from bar stock, with diameters ranging from M3 to M20 or larger. External threading and shoulder definition are executed in one cycle to maintain alignment between threads and drive surfaces. Hex heads, slots, or torx features are added using synchronized turning and milling cycles.
Deburring and Edge Breaks for Assembly Safety
Thread tips, undercuts, and shoulders are deburred to prevent galling or damage during automated assembly. Tapered lead-ins are applied to threads for improved engagement in blind holes or high-speed feed systems.
Surface Treatments for Industrial Fastener Durability
Passivation for Clean Surface and Oxidation Protection
Passivation to ASTM A967 standards removes surface iron and enhances corrosion resistance. Our in-house passivation process ensures Class 1000 cleanroom compatibility and prepares the surface for further coatings.
PVD Coating for Color Identification and Hardness
To improve wear performance and facilitate visual identification, we apply TiN, TiCN, or ZrN coatings via PVD technology. This increases surface hardness to 1800–2500 HV and reduces friction in automated tightening or release operations.
Coating thickness: 1–3 µm
Adhesion rating: Class 1 (DIN EN ISO 1071-2)
Color options: Gold, black, bronze, silver-gray
Inspection and Certification
Thread profile inspection with thread ring and plug gauges
100% visual inspection of head geometry and coating quality
Surface finish and hardness testing after PVD coating
Certifications: COC, ISO 9001, ISO 13485, material batch traceability
Why Choose Neway for Custom CNC Fastener Manufacturing
Proven capabilities in stainless steel CNC machining for precision threaded components
Fully integrated passivation and PVD finishing lines
Low-volume manufacturing support for custom non-catalog fasteners
One-stop CNC service with fast turnaround and consistent QA documentation
CNC Manufacturing Services for Non-Standard Fasteners in Automation
Neway supports automation system designers and equipment manufacturers with high-precision, corrosion-resistant fasteners customized to fit your engineering needs. Services include:
CNC Turning of 316L Stainless Steel: Specialized threading, shaft control, and concentricity for critical fasteners
Advanced Surface Finishing: PVD and passivation for harsh or cleanroom environments
Rapid CNC Prototyping: Validate custom fastener geometry before committing to production scale
Trust Neway to deliver fasteners that meet performance, tolerance, and finish standards for complex automation systems.
FAQs
What standards do you follow for CNC machining custom stainless fasteners?
Can Neway support different thread profiles including metric and unified threads?
How does PVD coating affect fastener tolerances and performance?
What is the minimum order quantity for non-standard CNC fasteners?
Do you provide both surface finish and dimensional inspection reports?
