All of Ceramco's stock solid ceramic Metric and U.S. Inch machine screws, bolts, matching hex nuts & flat washers are produced from the same material formulations as are many of our custom ceramic parts, including blends of either partially stabilized zirconia (PSZ) when toughness and other unique properties are required, or our A998 alumina (aluminum oxide, Al2O3).
Please refer to the chart: "Ceramco's Materials and Their Propertiess," for specific information on the applicable formulations.
This data is not guaranteed and is intended only as informational. Exposing ceramic fasteners to the same forces typically exerted on metal fasteners is not recommended and may result in catastrophic failure.
"Destructive Torque" in the table below refers to the average maximum torque on hex head bolts until failure.
Manufacturing & Quality Assurance
Tolerances on Length
a Shrink factor variations in processing and stack-up tolerance cannot be controlled on the thread pitch, precluding their checking with a thread guage.
No warrantee with respect to torque strength and tensile strength is extended, nor implied. Ceramic materials are inherently brittle and display catastrophic failure mode if impacted, or stressed beyond the material’s limit.
Further testing at Ceramco includes extensive random dimensional verification of samples and the monitoring and documentation of each raw materials batch.