Ceramic Fastener Installation Torque Values

Ceramco has established the below listed (maximum) service torque values for customers whose application(s) may be dependent on specific torque or preload requirements.

Solid Alumina (A998) Fasteners

Metric - Alumina
Size SCV. Torque (in*Lbf)
M2 x 0.4 0.35
M3 x 0.5 0.98
M4 x 0.7 1.97
M5 x 0.8 4.0
M6 x 1.0 10.95
M8 x 1.25 27.04
U.S. Inch - Alumina
Size SCV. Torque (in*Lbf)
#0-80 0.13
#2-56 0.4
#4-40 0.5
#5-40 1.27
#6-32 0.5
#8-32 1.98
#10-24 4.09
#10-32 1.95
1/4"-20 13.45
5/16"-18 25.74
3/8"-16 40.42

Solid Zirconia (3YTZP) Fasteners

Metric - Zirconia
Size SCV. Torque (in*Lbf)
M2 x 0.4 0.5
M3 x 0.5 1.93
M4 x 0.7 5.48
M5 x 0.8 8.4
M6 x 1.0 15.43
M8 x 1.25 - - -
U.S. Inch - Zirconia
Size SCV. Torque (in*Lbf)
#0-80 - - -
#2-56 0.56
#4-40 1.15
#5-40 1.79
#6-32 2.13
#8-32 4.24
#10-24 5.76
#10-32 7.45
1/4"-20 12.31
5/16"-18 - - -
3/8"-16 - - -

Heat Resistant Corrosion Resistant Non-conductive Non Out-Gassing

Stock ceramic fasteners from Ceramco, Inc. Specializing in OEM 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.