440TX


TORX PAN HEAD THREAD FORMING SCREWS
The self-forming trilobular screw is a triangular section screw with metric thread suitable for direct screwing in blind or through holes. Its main feature is to avoid the threading phase in steel and light alloy products. During screwing, this screw forms the thread plastically, i.e. by deforming the material, thus creating a play-free coupling between screw and nut, thus guaranteeing optimal fastening with high resistance to tearing and unscrewing due to the vibrations of use. The creation of the thread in this condition avoids the formation of shavings, a feature particularly required by several regulations concerning threads on blind holes. Regardless of the length of the screw, the efficiency of this thread is expressed in the first 20 / 25mm only starting from the tip. The presence of a longer thread length does not affect the screw's sealing capacity. The utmost attention must be paid to the holes or die-casting pins that will be used for the creation of the holes: an incorrect hole even if only five cents can in some cases radically change the tightness of the screw. It should also be said that not all the tables in circulation are correct for the use of the screws in question; this situation was created following the regulatory grouping of various types of self-forming screws, which however had different characteristics and therefore different holes of use. From our long and affirmed technical experience we can maintain that the hole suitable for any type of use is four or five tenths maximum smaller than the nominal diameter of the screw; in case of die-casting, a maximum taper of one degree must be calculated. Different tapers can create problems during particularly heavy tightening, as they interfere with the regulation of the screw: it can in fact have a forming part of four times its own pitch. Our trefoil screws, in addition to the galvanic treatment according to RoHs regulation, are subjected to a lubrication treatment, necessary to reduce the screwing effort by 30%.

The use of Torx allows to transmit a higher tightening torque than other impressions. It is a universal type of impression, unlike the specific ones that are used in the various countries of the world (cross, philips, pozi, slotted, square impressions and so on). Torx is particularly suitable for diameters from 4 upwards; applying it on smaller diameters is not particularly recommended as the reduced depth of the impression with respect to a cross can create problems during assembly. Precisely for this reason, if they are not mounted perfectly in line with the holes and with the screwdriver, the insert could escape from the screw seat.

The length of the screw is measured from the tip to the underhead.

Code Description Availability Certifications Request offer
440TX.0306ZN VITI TRILOBATE 3X6 TC TORX T10 ZINCATE Cr.3 886330.0
440TX.0306ZO VITI TRILOBATE M3X6 TC TORX T10 Z.NERO Cr. 3 0.0
440TX.0308ZN VITI TRILOBATE 3X8 TC TORX T10 ZINCATE cr.3 945700.0
440TX.0308ZO VITI TRILOBATE 3X8 TC TORX T10 Z.NERO Cr. 3 0.0
440TX.0310ZN VITI TRILOBATE 3X10 TC TORX T10 ZINCATE Cr.3 203900.0
440TX.0312ZN VITI TRILOBATE 3X12 TC TORX T10 ZINCATE Cr.3 146300.0
440TX.0318ZN VITI TRILOBATE 3X18 TC TORX T10 ZINCATE Cr.3 153500.0
440TX.03506ZN VITI TRILOBATE 3.5X 6 TC TORX T15 UNI 8112 ZINCATE Cr.3 201600.0
440TX.03508ZN VITI TRILOBATE 3.5X 8 TC TORX T15 UNI 8112 ZINCATE Cr.3 57500.0
440TX.03510ZN VITI TRILOBATE 3.5X10 TC TORX T15 UNI 8112 ZINCATE Cr.3 203000.0
440TX.03512ZN VITI TRILOBATE 3.5X12 TC TORX T15 UNI 8112 ZINCATE Cr.3 195700.0
440TX.0406ZN VITI TRILOBATE 4X 6 TC TORX T20 ZINCATE Cr.3 468445.0
440TX.0408ZN VITI TRILOBATE 4X 8 TC TORX T20 ZINCATE Cr.3 178900.0
440TX.0408ZO VITI TRILOBATE 4X 8 TC TORX T20 Z.NERE Cr.3 0.0
440TX.0410ZN VITI TRILOBATE 4X10 TC TORX T20 ZINCATE Cr.3 218650.0
440TX.0412ZN VITI TRILOBATE 4X12 TC TORX T20 ZINCATE Cr.3 279450.0
440TX.0415ZN VITI TRILOBATE 4X15 TC TORX T20 ZINCATE Cr.3 310100.0
440TX.0418ZN VITI TRILOBATE 4X18 TC TORX T20 ZINCATE Cr.3 109900.0
440TX.0420ZN VITI TRILOBATE 4X20 TC TORX T20 ZINCATE Cr.3 312690.0
440TX.0425ZN VITI TRILOBATE 4X25 TC TORX T20 ZINCATE Cr.3 153000.0
440TX.0430ZN VITI TRILOBATE 4X30 TC TORX T20 ZINCATE Cr.3 45750.0
440TX.0438GR VITI TRILOBATE 4X38 TC TORX T20 GREZZE 70000.0
440TX.0508ZN VITI TRILOBATE 5X 8 TC TORX T25 ZINCATE Cr.3 213310.0
440TX.0510ZN VITI TRILOBATE 5X10 TC TORX T25 ZINCATE Cr.3 3690.0
440TX.0512ZN VITI TRILOBATE 5X12 TC TORX T25 ZINCATE Cr.3 64200.0
440TX.0513ZN VITI TRILOBATE 5X13 TC TORX T25 ZINCATE Cr.3 0.0
440TX.0515ZN VITI TRILOBATE 5X15 TC TORX T25 ZINCATE Cr.3 0.0
440TX.0516ZN VITI TRILOBATE 5X16 TC TORX T25 ZINCATE Cr.3 0.0
440TX.0518ZN VITI TRILOBATE 5X18 TC TORX T25 ZINCATE Cr.3 155800.0
440TX.0520ZN VITI TRILOBATE 5X20 TC TORX T25 ZINCATE Cr.3 320000.0
440TX.0520ZO VITI TRILOBATE 5X20 TC TORX T25 Z.NERE Cr.3 0.0
440TX.0525ZN VITI TRILOBATE 5X25 TC TORX T25 ZINCATE Cr.3 172150.0
440TX.0530ZN VITI TRILOBATE 5X30 TC TORX T25 ZINCATE Cr.3 0.0
440TX.0532ZN VITI TRILOBATE 5X32 TC TORX T25 ZINCATE Cr.3 0.0
440TX.0610ZN VITI TRILOBATE 6X10 TC TORX T30 ZINCATE Cr.3 0.0
440TX.0612ZN VITI TRILOBATE 6X12 TC TORX T30 ZINCATE Cr.3 30950.0
440TX.0616ZN VITI TRILOBATE 6X16 TC TORX T30 ZINCATE Cr.3 91150.0
440TX.0616ZO VITI TRILOBATE 6X16 TC TORX T30 Z. NERE Cr.3 0.0
440TX.0618ZN7IV VITI TRILOBATE 6X18 TC TORX T30 ZINCATE 7IV + DEIDROGENATE 0.0
440TX.0620ZN VITI TRILOBATE 6X20 TC TORX T30 ZINCATE Cr.3 15550.0
440TX.0620ZO VITI TRILOBATE 6X20 TC TORX T30 Z. NERE Cr.3 0.0
440TX.0625ZN VITI TRILOBATE 6X25 TC TORX T30 ZINCATE Cr.3 12100.0
440TX.0630ZN VITI TRILOBATE 6X30 TC TORX T30 ZINCATE Cr.3 29900.0
440TX.0640ZN VITI TRILOBATE 6X40 TC TORX T30 ZINCATE Cr.3 0.0
440TX.0812T40ZN VITI TRILOBATE 8X12 TC TORX T40 ZINCATE Cr.3 17000.0
440TX.0812ZN VITI TRILOBATE 8X12 TC TORX T45 ZINCATE Cr.3 0.0
440TX.0815T40ZN VITI TRILOBATE 8X15 TC TORX T40 ZINCATE Cr.3 44950.0
440TX.0815ZN VITI TRILOBATE 8X15 TC TORX T45 ZINCATE Cr.3 0.0
440TX.0820ZN VITI TRILOBATE 8X20 TC TORX T45 ZINCATE Cr.3 64970.0
440TX.0820ZNN VITI TRILOBATE 8X20 TC TORX T45 ZINCO NIKEL NERO 7IV + S 0.0
440TX.0825ZN VITI TRILOBATE 8X25 TC TORX T45 ZINCATE Cr.3 59740.0