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Metric Series DUO-TAPTITE® Fasteners

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DUO-TAPTITE® Thread Rolling Screws

TAPTITE® screws were the leap forward in high production assembly using threaded fasteners. DUO-TAPTITE® screws represent the refinement of the TRILOBULAR™ principle for specific demanding applications.

DUO-TAPTITE® screws have generous lobulation at the screw point for easy entry and optimum thread forming action plus reduced lobulation in the screw body holding area. A stabilizing threaded dog point insures ready, aligned entry, with easy pick-up requiring minimal starting end load.


  • High vibrational resistance
  • Good axial alignment
  • Low end load
  • High strip-to-drive ratio
  • High prevailing torque
  • Good torque tension relationship
DUO-TAPTITE® fasteners, and/or their manufacture according to REMINC specifications, covered by one or more of the following patents: 6,089,806, 6,089,986, 6,261,040.

Note: All screws were tested in unthreaded weld nuts of uniform hardness (Rockwell B 82-84) having 7.1mm hole diameters. End pressure was manually developed, measured and recorded by an electronic load cell and recorder. Drive, prevailing and strip torque values, and torque-tension values were measured with a GSE torque cell and recorded on a BLH electronic recorder. All test data is based on 5/16 - 18 or M8 x 1.25 screws.

Originators of the Trilobular™ Family of Fasteners Providing Technical Support, Marketing Support and Innovative Fastener Design

Reduced In-Place Cost!!

DUO-TAPTITE® thread rolling screws reduce in-place fastener costs and provide vibration resistant assemblies.DUO-TAPTITE® thread rolling screws are used to create strong, uniform load carrying internal threads into untapped nut members upon installation. When REMINC developed the original TAPTITE® TRILOBULAR™ shape thread rolling screw, it revolutionized the use of threaded fasteners in high production assembly. Assembly efficiency and joint performance, along with lower in-place fastening cost, have been the benefits of using TAPTITE® screws. DUO-TAPTITE® screws and bolts continue these benefits along with meeting the quality and performance needs of the future.

Lower In-Place Fastening Costs

Only 15% of the total in-place cost of a fastening is the cost of the screw or bolt. DUO-TAPTITE® screws and bolts lower the cost of the remaining 85%. The following is a list of some of the cost-savings advantages of using DUO-TAPTITE® thread rolling screws.
  • Elimination of separate tapping operations and associated costs.
  • Built-in resistance to vibrational loosening eliminates the need for lock washers, adhesives, or plastic patches and plugs.
  • Generates stronger mating threads with uninterrupted grain flow due to work hardening of the nut for higher stripping resistance.
  • Accepts larger pilot hole variations than drilled and tapped holes.
  • Works in punched, drilled, cored and extruded holes in many different metals.
  • With use of CORFLEX® metallurgy, can be provided in grade strengths of high tensile bolts for use in structural applications in deep thread lengths of engagement.
  • No assembly line cross threading.
  • Prevailing torque often equals or exceeds locking screw standards.
  • Manufactured to REMINC standards all over the world by over 68 of the world's leading fastener, fastener processing and tooling companies.



Items  Request Information

  Item # Screw Size Max. C Dimension Min. C Dimension Max. D Dimension Min. D Dimension Max. Point Cp
item-1165 M2.5 x 0.45 mm 2.57 mm 2.48 mm 2.52 mm 2.44 mm 2.22 mm
item-1166 M3.0 x 0.50 mm 3.07 mm 2.98 mm 3.02 mm 2.93 mm 2.69 mm
item-1167 M3.5 x 0.60 mm 3.58 mm 3.48 mm 3.52 mm 3.42 mm 3.13 mm
item-1168 M4.0 x 0.70 mm 4.08 mm 3.98 mm 4.01 mm 3.91 mm 3.57 mm
item-1169 M4.5 x 0.75 mm 4.59 mm 4.48 mm 4.51 mm 4.41 mm 4.04 mm
item-1170 M5.0 x 0.80 mm 5.09 mm 4.98 mm 5.01 mm 4.90 mm 4.51 mm
item-1171 M6.0 x 1.00 mm 6.10 mm 5.97 mm 6.00 mm 5.87 mm 5.38 mm
item-1172 M7.0 x 1.00 mm 7.10 mm 6.97 mm 7.00 mm 6.87 mm 6.38 mm
item-1173 M8.0 x 1.25 mm 8.13 mm 7.97 mm 8.00 mm 7.85 mm 7.23 mm
item-1174 M10 x 1.50 mm 10.15 mm 9.97 mm 10.00 mm 9.82 mm 9.07 mm
item-1175 M12 x 1.75 mm 12.18 mm 11.97 mm 12.00 mm 11.80 mm 10.92 mm

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