Solid Ceramic

Socket Cap Head Machine Screws & Bolts - Metric  | → U.S. Inch

stock ceramic cap socket head fasteners - MetricMetric Cap Socket Head solid ceramic bolts and machine screws are fully threaded. Our solid ceramic fasteners are ISO 9001-2015 production systems certified and ideally suited for sealed chamber assemblies exposed to corrosion, elevated temperatures or magnetic fields.

Manufactured in New Hampshire, USA. Fastener orders shipped immediately from inventory.

No Free Samples

*Available sizes, compositions and lengths vary and may be dependent upon material properties and performance characteristics. Please check our website for the most up-to-date information.

Socket cap head metric fastener dimensional reference

To order fasteners:find the correct size, then select the composition you require.

    A B C
Size Composition Head Diameter Head Height Hexagon
Size Nom.
M2 x 0.4 alumina 3.65 - 3.8 1.91 - 2.0 1.5
M3 x 0.5 alumina 5.32 - 5.50 2.89 - 3.0 2.5
M4 x 0.7 alumina 6.8 - 7.0 3.88 - 4.0 3.0
M5 x 0.8 alumina 8.27 - 8.5 4.86 - 5.0 4.0
M6 x 1.0 alumina 9.74 - 10.0 5.85 - 6.0 5.0
M8 x 1.25 alumina 12.70 - 13.0 7.83 - 8.0 6.0

Dimensions Per ANSI B18.3.1M-1986

Important Information -Please Read

Alumina & zirconia (PSZ) fasteners

  1. The pitch diameter of male threads will not exceed the max allowable according to Class 2. Minimum allowable pitch diameter may be below that of Class 2, conversely for female threads. Due to shrink factor variances, the stack up tolerance cannot be controlled on the pitch. It is recommended that you not engage more than 5 to 10 threads on any male fastener.
  2. No warranty with respect to torque strength and tensile strength is extended or implied. Ceramic materials are inherently brittle and display catastrophic failure if impacted or stressed beyond material limits.

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.