Home

......................................................................................................

Suppliers sites with Screw sizes/Specs

1. Fuller metric.. Extensive range on DIN/ISO standard screws with dimensions
2. Pts-UK.. Sizes of various type of Screws
3. CorusConstruction..For details on Black Bolts and nuts etc. click Design > Fasteners
4. Maryland Metrics..Vast quantity of useful technical information on metric screws in downloadable acrobat pages

......................................................................................................

Sites Providing Information On Bolt/Screw Design

1. Bolt Science..A site dedicated to the science of Technology of bolted joints
2. Threaded Fasteners..A Section of the Site DESIGN AND ANALYSIS OF MACHINE ELEMENTS.
3. Bolted Joints..A paper published on the Web
4. Metric Bolt Strength..Bolt Sizes Strengths- American bias
5. Specifying Torque values for fasteners..A Page in Torqueleaders site

......................................................................................................

Note: on tapping holes:
I normally specify a tapped hole depth of 1.5 dia for a fully threaded hole in a blind tapped hole (steel male and female). The depth of threaded hole if a plug tap is not used i.e for automatic one stage tapping would be deeper.
According to BS1936 the tapping drill should be have a depth greater than the tapped depth (clearance depth) as follows


Less than M6 = 0.25 x full thread depth...
M6 TO M12 = 0.2 x full thread depth...
Greater than M12 = 0.15 x full thread depth.


Home

Please Send Comments to RoyBeardmore@ic24.net

Last Updated 29/10/2000