Ceramco Inc, custom ceramics and ceramic fasteners manufacturer
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Fasteners
Dimensional Specs
Strength Properties
General Properties

Aluminum Oxide
Zirconium Oxide
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Notes
1. Due to our manufacturing process, point to point dimensions may not meet the ANSI B18.2.4.1M and B18.2.4.2M-1979 (R1995) standard.

2. Metric thread pitches are designated as pitch length in millimeters.

3. All ceramic screws and ceramic bolts are fully threaded.

4. All dimensions shown are in millimeters.

Dimensional Specifications - Hex Head Machine Screws & Bolts

Hex Head Metric Fastener Dimensions Per ANSI B18.6.7M-1985
Size x Thread Pitch
Hex Head
Body Diameter
Hex Width
Across Flats
Hex Width
Across Corners
Head
Height
Underhead Fillet
Transition Dia.
Underhead Fillet
Radius
M2x0.4 1.65 - 2.00 3.02 - 3.20 3.38 Min
1.3 - 1.6
2.6 Max 
.1 Min 
M3x0.5
2.58 - 3.00
 4.85 - 5.00 5.40 Min 2.0 - 2.3
3.6 Max 
.1 Min 
M4x0.7
3.43 - 4.00 
 6.78 - 7.00
7.59 Min
 2.6 - 3.0
4.7 Max 
.2 Min 
M5x0.8 4.36 - 5.00 7.78 - 8.00 8.71 Min 3.3 - 3.8 5.7 Max .2 Min
M6x1.0 5.21 - 6.00 9.78 - 10.00
10.95 Min 
4.1 - 4.7 
6.8 Max 
 .3 Min
M8x1.25
7.04 - 8.00 
 12.73 - 13.00 14.26 Min 5.2 - 6.0
9.2 Max 
.4 Min 

 

     

     

     

     

     

     

     
     
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    P.O. Box 300, 1467 East Main Street, Center Conway, NH 03813
    Tel: (603) 447-2090 | Fax: (603) 447-3906