Soild ceramic hex head bolt, flat washer and hex nutFastener Failure in Vacuum, or Gas-tight, Environments… SOLVED!

Solid ceramic fasteners are ideal in both vacuum and gas-tight environmentsWhile there are many fasteners that can hold a vacuum and/or maintain a gas-tight seal, a solid ceramic fastener can do either while in hostile environments, with zero contamination. Solid ceramic fasteners from Ceramco deliver these capabilities and much more!

Contamination-free Vacuums

When ultra-sensitive laboratory equipment conducts analysis on the atomic level, the slightest variation in accuracy is unacceptable. The high purity of Ceramco’s, chemically inert, solid alumina ceramic fasteners delivers contamination-free performance, while helping maintain a leak-free vacuum environment.

Lasers are another application which require a dust-free vacuum environment. Other material requirements include: highly polished, extremely reflective surfaces. Solid ceramic fasteners from Ceramco possess the inherent properties to effectively deal with these requirements and the environmental conditions that result.

Gas-tight Enclosures, in Extreme Environments

Solid ceramic fasteners easily withstand continuous exposure high temperature, corrosives, and are non-conductive in electrical fields. Even while exposed to some (or all) of these conditions, solid ceramic fasteners can also continue helping to keep gas-tight enclosures leak-free.

Selecting the correct ceramic material for a fastener may require guidance from Ceramco's materials engineers. Please contact us for assistance.


You now know solid ceramic fasteners from Ceramco provide leak free connections, hold a vacuum and keep contaminates out. What you may not realize is that manufacturing techniques exist to produce a solid ceramic fastener that is also strong.

Strength is accomplished in two ways:

  1. Fully molding the solid ceramic fastener, including the threads to avoid machining, as it is the machining that weakens the ceramic.
  2. Full density firing of the solid ceramic fastener; the ceramic composition determines the length of time it can fired.

Ceramco’s alumina and zirconia fastener compositions are fully molded and fired to full density, resulting in a heat resistant and strong solid ceramic fastener. Solid ceramic fasteners (like all fasteners) have limits to their strength ratings. These characteristics are called: Mechanical Properties. When not over-torqued, or subjected to impacts, Ceramco’s solid ceramic fasteners deliver consistent, reliable and long lasting performance in vacuum and gas-tight environments.

Please contact Ceramco for assistance with questions on solid ceramic fastener material strength.

Comparison of Material Properties a

Material Maximum
of Thermal
Alumina (99.8%) Very High Very Low Very Low Excellent Low
Zirconia TZP b Moderate Very Low Very Low Excellent Very Low
Molybdenum Very High Very High Low Poor Very Low
Nylon 6,6 Very Low Very Low Very Low Excellent Low
Stainless Steel Moderate High Moderate Very Poor Very High
Titanium High Moderate High Very Poor Moderate
a. Averages intended for quick comparison only. No guarantee should be assumed or is implied.
b. Yttria Stabilized

ISO 9001:2015 CertifiedMore Information

Want to learn more about the properties of Ceramco's ceramic products, materials and processes?

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Heat Resistant Corrosion Resistant Non-conductive Non Out-Gassing

Stock ceramic fasteners from Ceramco, Inc. Specializing in custom ceramic parts of complex geometries. Learn More.

Immediate Assistance is only a phone call away. If you have any questions or require additional information, please call Ceramco at: +1 (603) 447-2090, Monday - Friday, 8:00 am - 4:30 pm, U.S. Eastern.