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.
DUO-TAPTITE® screws & bolts are available in inch and metric sizes, with head style to suit.
Less cocking at start of driving operation ... the self-aligning characteristic
of
| TYPICAL ANGULARITY | |
| DUO-TAPTITE® | COMPETITIVE ROUND-BODIED THREAD-FORMING SCREW |
| 2° | 5° |
| 1° | 3° |
| 2° | 4° |
| 2° | 3° |
Lower starting end pressure combines with lower driving torque to reduce time
and power costs right down the line.
A - Higher strip-to-drive ratio The higher, more uniform, strip-to-drive torque ratio
of DUO-TAPTITE® screws
provides a built-in safety factor against over-driving. Eliminates broken screws,
damaged mating threads and inferior fastenings.
B - Higher prevailing torqueSuperior elastic action of a DUO-TAPTITE® screw gives it better locking characteristics than many fasteners specifically designed as locking screws! Competitive round-bodied, thread-forming fasteners have no locking torque. Graph shows comparison of DUO-TAPTITE® screw with IFI-124 minimum requirement for self-locking screws.
Superior tension at any given applied torque (with normal clamping pressure)
is a major factor in the better holding capability of a DUO-TAPTITE® screw.
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.
TAPTITE II® Fasteners | Fastener Heat Treatment | Back to Screws for Metal
