Product Overview
The PTFE Stud is a precision-machined threaded rod manufactured from 100% Polytetrafluoroethylene (PTFE) or specified PTFE-based compounds. Engineered for extreme service conditions, it provides exceptional chemical resistance, a wide operating temperature range, inherent non-stick properties, and excellent electrical insulation. This fastener is indispensable in industries where metal or other plastics would fail due to corrosion, contamination, or electrical hazards.
Key Features & Benefits
Unmatched Chemical Inertness: Resists virtually all aggressive chemicals, including strong acids, bases, and solvents, making it ideal for corrosive fluid handling.
Ultra-Low Friction & Non-Stick: The lowest coefficient of friction of any solid material, preventing material buildup and facilitating easy cleaning.
Exceptional Electrical Insulation: Outstanding dielectric properties across a wide frequency range, suitable for high-voltage and sensitive electronic applications.
Broad Temperature Range: Maintains functionality from cryogenic temperatures (-200°C / -328°F) up to +260°C (+500°F) continuous service.
High Purity & Non-Contaminating: Does not leach ions or organic compounds, making it compliant with FDA, USP Class VI, and other purity standards for food, pharmaceutical, and semiconductor processing.
Material Specifications & Compounds
Pure PTFE and modified compounds are selected based on specific application requirements.
| Material Type | Designation / Compound | Key Characteristics & Typical Use |
|---|---|---|
| Virgin PTFE | 100% Polytetrafluoroethylene | Highest chemical purity, excellent electrical properties. For ultra-clean or highly aggressive chemical service. |
| Glass-Filled PTFE | PTFE + 15%-25% Glass Fiber | Improved creep resistance, reduced cold flow, higher mechanical strength. For structural or load-bearing applications. |
| Carbon-Filled PTFE | PTFE + Carbon/Graphite | Enhanced wear resistance, improved thermal conductivity, anti-static properties. For bearing and wear applications. |
| Stainless Steel Core / PTFE Sheath | Hybrid Construction | Combines the tensile strength of a metal core with the chemical/electrical properties of a PTFE sleeve. |
Technical Data & Specifications
Manufacturing Process: Precision machined from extruded rod or molded blanks to ensure dimensional accuracy and thread integrity.
Thread Standards: Available in ISO Metric (M Series) and Imperial (UNC/UNF) thread forms. Threads are typically cut, not rolled, due to material properties.
Dimensional Tolerance: Machining allows for tighter tolerances than typical molded plastic parts. Standard commercial tolerances apply unless otherwise specified.
Physical Properties: (Typical for Virgin PTFE)
Tensile Strength: 20-35 MPa
Elongation at Break: 300-500%
Dielectric Strength: >40 kV/mm
Limitations: PTFE exhibits cold flow (creep) under sustained load. Design must account for this by using adequate bearing area or frequent re-torquing.
Standard Finishes & Colors
Natural (White): Standard color for virgin and most filled PTFE compounds.
Black: Standard for carbon/graphite-filled compounds. Can also be achieved with pigments in other compounds.
Other Colors: Custom colors (e.g., blue, green, red) are available for coding or identification purposes using FDA-compliant masterbatches.
Surface Finish: As-machined surface is standard. Smoother finishes can be achieved upon request.
Typical Applications
Chemical Processing: Pump column spacers, tank fittings, sensor mounts, and agitator assemblies in corrosive environments.
Pharmaceutical & Biotechnology: Fermenter internals, piping supports, and equipment within CIP/SIP systems.
Food & Beverage: Equipment for processing acidic juices, dairy, or sauces where cleanliness and non-contamination are critical.
Semiconductor Manufacturing: Wafer handling fixtures, wet bench components, and exhaust ducting supports in cleanrooms.
Electrical & High-Voltage: Insulating spacers, bushings, and supports in transformers, switchgear, and power distribution systems.
Quality Assurance & Compliance
Material Certification: Certificates of Conformity provided, stating material grade and compound.
Dimensional Inspection: Critical dimensions are verified per drawing specifications.
Compliance: Materials can be supplied with compliance statements for FDA 21 CFR 177.1550, USP Class VI, EU Regulation 10/2011 (Food Contact), and RoHS/REACH upon request.
Quality System: Manufactured under a certified ISO 9001:2015 quality management system.
Manufacturing Expertise
Our PTFE Studs are precision-machined by Hebei Wohe Fastener Manufacturing Co. Ltd. in a dedicated, contaminant-controlled workshop separate from metalworking operations. We utilize CNC lathes and machining centers equipped for plastics to produce components with sharp, clean threads and precise dimensions. Our expertise extends to selecting the optimal PTFE compound for the application and providing design consultation to account for PTFE’s unique mechanical behavior, ensuring reliable performance in our clients’ most challenging applications.
Ordering & Customization:
Specification: Provide Material Compound, Thread Size & Pitch (e.g., M10x1.5), Overall Length, Quantity, and any Special Tolerances or Finishes.
Custom Fabrication: We specialize in custom diameters, lengths, thread forms, and hybrid assemblies (e.g., PTFE with metal inserts).
Prototype Service: Available for design validation.
Packaging: Clean, static-dissipative, or sealed packaging available to prevent contamination.
MOQ: Low minimums for standard sizes. Custom parts: subject to engineering review.
Lead Time: Standard items: 15-20 working days. Custom parts: 25-35 working days.
Disclaimer: PTFE is a viscoelastic material with unique properties. Successful application requires consideration of its creep behavior, thermal expansion, and load limitations. The data provided is typical and for reference only. Final material selection and design validation for the specific application are the responsibility of the user. Specifications are subject to change.
