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Fasteners 8_17.qxp_Layout 1  8/18/17  11:55 AM  Page 3

            SELF-DRILLING SCREWS





              TECHNICAL INFORMATION

              Ultimate Strength Values †                       Shear Values †
              Carbon Steel, Case Hardened Product              (Average Lbs. Ultimate)
                                                                                               Shear


                    Size                      Tensile         Shear          Torque
                               Lbs.         Avg.   Lbs.       Min.                        Gauge                                                                  0.125
                               Min.             Ult.             In.-Lbs.  Desc.                 Pt.         26         24       22        20           18              16             14           12         (1/8")
                     8-18               1,615           1,100              42  8-18  2  301 500  542 742  1,049  —   —  —    —
                     8-32     1,890   1,228   48                10-16   1   403 585  673  883   1,330  —  —   —   —
                     10-16    2,200   1,470   61                10-16   3   —    461  524  731   1,254  1,524  1,674 —   —
                     10-24    2,362   1,535   65                12-14   1   437  718  763  1,030   1,548  —  —  —   —
                     12-14    2,950   1,960   92                12-14   2   370 607  622  860   1,360  1,690  2,112  2,212  —
                     12-24    3,400   2,275   100               12-14   3   —  —  —  775     1,361  1,624  1,974  1,993  —
                     1/4-14   3,850   2,580   150               12-24   4   —  —  —  —       —     1,430  1,930  2,455  2,573
                     1/4-20   4,276   2,860   168               12-24    4.5  —  —  —  —     —     1,389    1,920   2,174    2,257
                     5/16-12   7,650   5,100   250              12-24    5   —  —  — —       —     1,351  1,825  2,152  2,226
                     5/16-18   8,903   5,247   438              1/4-14   1   519  863  892  1,301   1,771  —   —   —   —
                     11/32-12   8,550   5,700   400             1/4-14   3   — —  —  930     1,447  2,102  2,584  2,650  —
                     23/64-12   9,150   6,100   425             1/4-20   5   —  —  —  —      —     1,655  2,277 —  3,210




                                                                Pull-out
              Ultimate Average Fastener Pull-Out Values (Lbs) †



                                                                  Material Thickness
                            Point    26    24               22               20  18  16  14  12
                   Descrip.  Type    Ga.   Ga.              Ga.              Ga.             Ga.  Ga.  Ga.  Ga.           .120"         3/16"         1/4"  5/16"            3/8"
                   8-18      2      120   197   268   301    494   702   961   1,615  —    —     —      —     —
                   10-16     1      151   242   315   361    565   826   1,092   1,791  —   —    —      —     —
                   10-16     3      130   206   272   303    498   702   970   1,495  —    —     —      —     —
                   12-14     1      161   260   332   394    640   920   1,262   1,940  —   —    —      —     —
                   12-14     2      154   247   286   379    609   852   1,186   1,863  2,345   —   —   —     —
                   12-14     3      142   214   296   349    580   767   1,078   1,553  1,956  —   —    —     —
                   12-24     5      —     —     —     311    452   1,060  1,288   1,844  2,205   3,237  —   —   —
                   1/4-14    1      228   342   432   571    801   1,169  —    —     —     —     —      —     —
                   1/4-14    3      150   238   301   340    702   891   1,162   1,798  2,120   —   —   —     —
                   1/4-20    3      —     —     —     337    571   1,232  1,525   2,212  2,447   4,066  —   —   —
                   1/4-20    5      —     —     —     —      —     —    —      —     3,431   4,801  5,261  —   —
                   5/16-12   3      —     —     —     491    706   1,609  1,707   2,831  2,915   3,745  —   —   —
                            (.260 dia.)
                   5/16-18   3      —     —     —     457    568   1,209  1,712   2,422  2,601   3,716  5,122   5,288   —
                            (.290 dia.)
                   14-10 SS   A     270   363   426   459    657   1,194  1,368   —   —    —     —      —     —
                   1/4-14 SS  B                    216       344        383        411       571        686        983       1,698       2,242        2,693  3,695  3,746  3,484

                  NOTE: SS = Stainless Steel; CS = Carbon Steel        The information and data contained on this page is current as of publication date.
                  †NOTE: Test values shown are ultimate average values obtained under laboratory conditions and apply to fasteners manufactured by Elco Construction Products only.
                  NOTE: All ELCO performance data shown in this catalog is based on tests performed under laboratory conditions at independent construction testing facilities. The appropriate safety factor should be
                  applied and code requirements factored into specification and use of these fasteners. A safety factor of 4:1 or 25% of the ultimate average values shown is generally accepted as an appropriate working load. Final
                  determination of the appropriate safety factor and use of these fasteners is the sole responsibility of the user, specifying Engineer, Architect or other responsible person designing the connection. Due to a wide
                  variety of application conditions or intervening factors not under our control, we assume no liability for the use of the information provided in this document.
                  For additional product information and technical assistance, please contact a Tanner Representative.
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