Home Page

The fasteners most frequently used by machinery designers are screws, nuts, retaining rings and various types of pins because of the basic role that they play In the assembly of all mechanisms. There are many instances where these fasteners have been improved by patented innovations and are familiar to most designers.
     Our staff of experienced engineers after careful consideration, compiled in this catalog a group of fasteners which are most often used by designers of all types of machine devices. This technical section on fasteners consists of a number of useful design tables and are presented in the following order:

         1. Screws
            Table       1. Stress Areas of Unified Screw Threads, UNC and UNF
                          2. Standards For Inch Size Fasteners
                          3. Standards For Metric Threads
                          4. Screw Head Dimensions
                          5. Max. Torque Values For Fasteners of Different Materials
                          6. Max. Tightening Torques For Hex Socket Head Screw Products
                          7. Torsional Holding Power (in-lbs) For Cup-Point Set Screws

          2. Pins
             Table     8. Shear Strength For Solid Pins

          3. Non-Metallic Fasteners 
             Table     9. Properties of Zytel and PVC
                        10. Nylon Thread Rod and Screw Torque Data
                        11. Nylon Nut Torque Data

          4. Hub Fasteners
              Table   12. Correlation of Bores and Sot Screw Sizes

T22