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Fasteners 8_17.qxp_Layout 1  8/18/17  11:55 AM  Page 14

                                                                    SELF-DRILLING SCREWS





             SELF-DRILLING SCREWS Globally Sourced
        FASTENERS  A self-drilling screw has a drill-bit point to help drill into metal without pre-  Drill Point Size


                                                                    The length of the drill point determines the material thickness whichthe
            drilling holes in steel base materials up to 1/2” thick. Self-drilling screws are
                                                                    screw can reliably penetrate. The unthreaded portion of the point, known as
            available in a variety of head styles, thread lengths and drill flute lengths for
                                                                    the pilot, must be long enough to completely drill through the material before
            screw diameters #6 thru 5/16’-18. They are also referred to as tek screws.
                                                                    the threads engage. Since threads advance faster than the drilling process, if
            Self-drilling screws create their own hole and form their own mating thread  they engage before drilling is done the fastener can bind and  break.
            in the process. Designed for convenience, self-drilling screws require only a
            screwgun to fix them in place, instead of using a drill to start the hole.  RPM
            When selecting a self-drilling screw design, it is important to consider the  The speed at which the screwdriver motor runs while the screw is installed.
            material thickness and type of materials to be joined.  This is often adjustable using a variable-pull trigger or different driver motor.

            Recommendation & Performance Data                        Ultimate Value Chart

             IDENTIFICATION                         RECOMMENDATION                            PERFORMANCE  Tension (Pull Out) Lbs. and  METAL GAUGE 1(LB) THICKNESS
                                                                       Shear Lbs. Metal to Metal
                                     Metal        Drill         Axial            Drill   Nom.  Min.
            Diam.     Drive   Drill Pt.     Inches             Gauge       Speed     Material    Load         Time  Screw    Drill  Torsional
                                           Rpm                               Lbs.           Sec.
                                                                     Dia.          Dia.        Pt.   Strength    25       22        20         18        16         14       12      3/16”    1/4”     3/8”     1/2”
             #6            1/4”  #2  .036” - .078”  20-14  2500  0.060”  30  3.0   6-20  0.138     #2            24         128     176     263 426       598     911   1156       -           -            -           -
             #8            1/4”  #2  .036” - .094”  20-13  2500  0.060”  30  4.0  -            449     683  728 1091 1148      -            -           -            -           -
             #10         5/16”  #2  .036” - .109”  20-12  2500  0.060”  30  4.0  8-18        0.164     #2            42           97     196      285 444       550     924 1100      -            -            -           -
             #10         1/4”  #2  .036” - .109”  20-12  2500  0.060”  30  4.0         -  -  580      829 1096 1332   1337       -            -           -           -
             #10         5/16”  #3  .109” - .179”  20-8  2500  0.135”  40  6.0  10-16     0.190     #3            61            -          -         389 554       727 1050   1216       -           -            -           -
             #12         5/16”  #2 pilot .036” - .210”  20-6  2500  0.135”  40  6.0    -       602      811    1223 1492 1545   1650       -           -            -           -
             #12         5/16”  #3  .100” - .220”  22-5  2500  0.135”  40  7.0  12-14     0.216     #3            92            -          -         314       472  735 1057   1242   3394       -            -           -
             #12         3/8”  #4  .170” - .375”  8-000  1500  0.370”  60  16.0
                                                                                      -          -  698 983 1556 2072   2210       -           -            -           -
             #14         3/8”  #1 stitch .036” - .094”  20-13  2500  0.060”  30  5.0
                                                                     12-24     0.216     #5            92           -          -           -          468       697     986   1535   3124 3696       -          -
             #14         3/8”  #3  .109” - .250”  12-3  1500  0.250”  50  18.0
                                                                                      -          -  -            -            -           -          -            -          2650      -        3310
             #14         3/8”  #4  .109” - .375”  12-000  1500  0.375”  60  20.0
                                                                     1/4-14    0.250     #1         150         332     431     565      803 1154      -          -            -            -  -  -
             #14         3/8”  #5  .179” - .500”  8-0000000 1200  0.500”  60  30.0
                                                                                      -           -           -            -          -           -          -            -            -            -           -
           Drilling capacities may vary. This table is intended only as a guide and does not constitute a   1/4-14    0.250     #3         150           -           -        300 402       776 1057   1477   3941       -            -           -
           warranty of any kind.                                                      -           -        930    1442 2100 2584   2650      -            -            -           -
                                                                     1/4-20    0.250     #4         150          -            -            -           -          601     896   1445 3520       -            -           -
            Steel Stud Gauge Guide                                                                               2650       -         2820
                                                                     1/4-20    0.250     #5         150          -            -           -           -           -           -           -        2672    3629    3791   4739
                                  Drywall Structural                                   -         -           -           -            -           -          -            -      2650       -   2820
            Steel Gauge            26          25           22           20          20         18           16           14           12          10  These figures are offered only as a guide and are not guaranteed in any way by Tanner Fasteners &
            Thickness (In.)  0.0163  0.0179  0.0269  0.0296  0.0329  0.0428  0.0538  0.0677  0.0966  0.1180  Industrial Supplies. A 4:1 safety ratio is recommended.
            Thickness (Mil.)    16          18           27           30           33         43          54            68            97          118
                                                                    The information and data contained on this page is current as of publication date.
            Plating Comparison Chart
                                                                                          All Salt Spray Certification in accordance with ASTM B117
                                                                          CORROSION
            PRODUCT/FINISH  FINISH CONTENT     APPLICATION                RESISTANCE                      ADVANTAGES
            Zinc                                         Zinc Phosphate                                   Minimum Corrosion Resistance for all                     24 Hour                           Price
                                              Carbon Steel Fasteners                                                 Salt Spray
            Tanner Guard                       Three Layer Process                           Exterior Application, Metal Building, Wood           1000 Hour                       Excellent Corrosion Resistance against Gas, Salt Water,
                                              Decking/Fencing Cement Board Concrete/            Salt Spray   Weathering  & other corrosive factors including
                                              Masonry                                 contact with other materials
            Tanner Ultra-Guard  Zinc/Chrome Substrate with         For use with any ACQ Treated Lumber                     1000 Hour                       Superior Corrosion Resistance specifically
                           Proprietary Organic Topcoat                    Salt Spray  in ACQ Treated Lumber ACQ Approved
            Tanner Pro Ultra-Guard  Zinc/Chrome Substrate with          For use with any ACQ Treated Lumber                      2000 Hour                      Best Coating Available specifically
                           Proprietary Organic Topcoat                    Salt Spray  in ACQ Treated Lumber
                                                                          ACQ Approved
            Tanner Ceramic  Primeseal Base Coat with   Aluminum Industry  2000 Hour   Best Coating Available for Extreme Environments
            Multi-Color                            Color Stable Top Coat  Salt Spray  in the Aluminum Industry
       14
           800 456-2658         email: sales@tannerbolt.com        www.shoptanner.com
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