Thread Rite Screw Products - Fasteners Thread Rite Screw Products - Fasteners Thread Rite Screw Products - Fasteners Thread Rite Screw Products - Fasteners Thread Rite Screw Products - Fasteners
Thread Rite Screw Products - Fasteners Thread Rite Screw Products - Fasteners
Thread Rite Screw Products - Fasteners
Thread Rite Screw Products - Fasteners
Thread-Rite Screw Products - Fasteners
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TEKS® Self-Drilling Fasteners

ITW Shakeproof produces both forged point and milled point Teks self-drilling fasteners that drill their own hole in thin sheet metal, heavier gauge metals and non-metallics. They form close mating threads in these holes to produce a complete fastening system in a single operation. This total performance self-drilling fastener reduces labor, is ideal for automated assembly, simplifies and improves fastening designs, reduces or eliminates the need for drill bits or taps and cuts expensive tooling costs.

GER-NIB® FEATURE: For particularly torque-sensitive applications, Shakeproof's torque-robbing Ger-Nib feature can be incorporated in the Teks fastener head.

Tapping and Fastening

Once the hole is drilled, Teks fasteners tap the hole in the same way as thread forming or thread cutting screws do in a pre-drilled hole. Teks fasteners, however, provide two outstanding installation advantages over ordinary self-tapping screws:

  • By point design and diameter control, Teks fasteners always drill the proper hole for optimum fastening. The possibility of an incorrect hole diameter or an out-of-round condition is eliminated, assuring consistent driving and fastening torque.
  • Torque variations caused by paint build-up, weld flash or foreign material in pre-drilled or pre-punched holes are eliminated.

Drilling

Figure 1 shows a No. 8-18 Teks fastener drilling a hole in steel. Maximum drilling efficiency is attained as it advances at the rate of .004" per revolution. The screw thread rate of advancement, however, is .055" per revolution. It is therefore essential that the drilling function be complete and the material be fully penetrated before the first screw thread engages. To meet this requirement, the unthreaded length of the Teks point must be equal to, or greater than, the material thickness to be drilled. It is important to understand that where more than one sheet of material is involved, the calculation of the total thickness of the material to be drilled must include voids or spaces between the sheets. Figure 2 illustrates three examples.

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