440


UNI 8112 - DIN 7500C

TRILOBULAR SCREWS CYLINDRICAL HEAD IMPRESSION CROSS PHILIPS
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 length of the screw is measured from the tip to the underhead.

Code Description Availability Certifications Request offer
440.0204ZN VITI TRILOBATE 2 X 4 TC+ UNI 8112 ZINCATE Cr.3 208000.0
440.0205ZN VITI TRILOBATE 2 X 5 TC+ UNI 8112 ZINCATE Cr.3 206800.0
440.0206ZN VITI TRILOBATE 2 X 6 TC+ UNI 8112 ZINCATE Cr.3 149100.0
440.0208ZN VITI TRILOBATE 2 X 8 TC+ UNI 8112 ZINCATE Cr.3 198200.0
440.0210ZN VITI TRILOBATE 2 X10 TC+ UNI 8112 ZINCATE Cr.3 217800.0
440.02504ZN VITI TRILOBATE 2.5X 4 TC+ UNI 8112 ZINCATE Cr.3 124500.0
440.02505ZN VITI TRILOBATE 2.5X 5 TC+ UNI 8112 ZINCATE Cr.3 206000.0
440.02505ZO VITI TRILOBATE 2.5X 5 TC+ UNI 8112 Z.NERO Cr.3 0.0
440.02506ZN VITI TRILOBATE 2.5X 6 TC+ UNI 8112 ZINCATE Cr.3 33770.0
440.02508ZN VITI TRILOBATE 2.5X 8 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.02508ZO VITI TRILOBATE 2.5X 8 TC+ UNI 8112 Z.NERO Cr.3 0.0
440.02510ZN VITI TRILOBATE 2.5X10 TC+ UNI 8112 ZINCATE Cr.3 442000.0
440.02512ZN VITI TRILOBATE 2.5X12 TC+ UNI 8112 ZINCATE Cr.3 362500.0
440.02515ZN VITI TRILOBATE 2.5X15 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.02518ZN VITI TRILOBATE 2.5X18 TC+ UNI 8112 ZINCATE Cr.3 237000.0
440.02520ZN VITI TRILOBATE 2.5X20 TC+ UNI 8112 ZINCATE Cr.3 180300.0
440.0304ZN VITI TRILOBATE 3X 4 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0304ZO VITI TRILOBATE 3X 4 TC+ UNI 8112 Z.NERO Cr.3 0.0
440.0305ZN VITI TRILOBATE 3X 5 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0306ZN VITI TRILOBATE 3X 6 TC+ UNI 8112 ZINCATE Cr.3 80000.0
440.0308ZN VITI TRILOBATE 3X 8 TC+ UNI 8112 ZINCATE Cr.3 25440.0
440.0308ZO VITI TRILOBATE 3X 8 TC+ UNI 8112 Z. NERE Cr.3 0.0
440.0310ZN VITI TRILOBATE 3X10 TC+ UNI 8112 ZINCATE Cr.3 25.0
440.0312ZN VITI TRILOBATE 3X12 TC+ UNI 8112 ZINCATE Cr.3 419300.0
440.0315ZN VITI TRILOBATE 3X15 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0318ZN VITI TRILOBATE 3X18 TC+ UNI 8112 ZINCATE Cr.3 70000.0
440.0320ZN VITI TRILOBATE 3X20 TC+ UNI 8112 ZINCATE Cr.3 87000.0
440.0325ZN VITI TRILOBATE 3X25 TC+ UNI 8112 ZINCATE Cr.3 67000.0
440.0330ZN VITI TRILOBATE 3X30 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.03506ZN VITI TRILOBATE 3.5X 6 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.03507ZN VITI TRILOBATE 3.5X 7 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.03508ZN VITI TRILOBATE 3.5X 8 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.03510ZN VITI TRILOBATE 3.5X10 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.03512ZN VITI TRILOBATE 3.5X12 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.03515ZN VITI TRILOBATE 3.5X15 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.03520ZN VITI TRILOBATE 3.5X20 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.03525ZN VITI TRILOBATE 3.5X25 TC+ UNI 8112 ZINCATE Cr.3 178000.0
440.0406GR VITI TRILOBATE 4X 6 TC+ UNI 8112 GREZZE 120000.0
440.0406ZN VITI TRILOBATE 4X 6 TC+ UNI 8112 ZINCATE Cr.3 123000.0
440.0406ZO VITI TRILOBATE 4X 6 TC+ UNI 8112 ZNERO Cr.3 0.0
440.0407ZN VITI TRILOBATE 4X 7 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0408ZN VITI TRILOBATE 4X 8 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0410ZN VITI TRILOBATE 4X10 TC+ UNI 8112 ZINCATE Cr.3 138200.0
440.0410ZO VITI TRILOBATE 4X10 TC+ UNI 8112 Z.NERO Cr.3 0.0
440.0412ZN VITI TRILOBATE 4X12 TC+ UNI 8112 ZINCATE Cr.3 319100.0
440.0415ZN VITI TRILOBATE 4X15 TC+ UNI 8112 ZINCATE Cr.3 265000.0
440.0416ZN VITI TRILOBATE 4X16 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0418ZN VITI TRILOBATE 4X18 TC+ UNI 8112 ZINCATE Cr.3 104080.0
440.0420ZN VITI TRILOBATE 4X20 TC+ UNI 8112 ZINCATE Cr.3 211000.0
440.0425ZN VITI TRILOBATE 4X25 TC+ UNI 8112 ZINCATE Cr.3 105200.0
440.0430ZN VITI TRILOBATE 4X30 TC+ UNI 8112 ZINCATE Cr.3 151800.0
440.0432ZN VITI TRILOBATE 4X32 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0435ZN VITI TRILOBATE 4X35 TC+ UNI 8112 ZINCATE Cr.3 252050.0
440.0440ZN VITI TRILOBATE 4X40 TC+ UNI 8112 ZINCATE Cr.3 79500.0
440.0445ZN VITI TRILOBATE 4X45 TC+ UNI 8112 ZINCATE Cr.3 16850.0
440.0450ZN VITI TRILOBATE 4X50 TC+ UNI 8112 ZINCATE Cr.3 37500.0
440.0506ZN VITI TRILOBATE 5X 6 TC+ UNI 8112 ZINCATE Cr.3 103700.0
440.0508ZN VITI TRILOBATE 5X 8 TC+ UNI 8112 ZINCATE Cr.3 40000.0
440.0510ZN VITI TRILOBATE 5X10 TC+ UNI 8112 ZINCATE Cr.3 253700.0
440.0512ZN VITI TRILOBATE 5X12 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0514ZN VITI TRILOBATE 5X14 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0515TR VITI TRILOBATE 5X15 TC+ UNI 8112 TROPICAL 0.0
440.0515ZN VITI TRILOBATE 5X15 TC+ UNI 8112 ZINCATE Cr.3 238400.0
440.0515ZO VITI TRILOBATE 5X15 TC+ UNI 8112 Z.NERE Cr.3 0.0
440.0518ZN VITI TRILOBATE 5X18 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0520ZN VITI TRILOBATE 5X20 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0522ZN VITI TRILOBATE 5X22 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0525GR VITI TRILOBATE 5X25 TC+ UNI 8112 GREZZE 0.0
440.0525ZN VITI TRILOBATE 5X25 TC+ UNI 8112 ZINCATE Cr.3 85300.0
440.0525ZO VITI TRILOBATE 5X25 TC+ UNI 8112 Z. NERE Cr.3 0.0
440.0530ZN VITI TRILOBATE 5X30 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0535ZN VITI TRILOBATE 5X35 TC+ UNI 8112 ZINCATE Cr.3 82100.0
440.0540ZN VITI TRILOBATE 5X40 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0545ZN VITI TRILOBATE 5X45 TC+ UNI 8112 ZINCATE Cr.3 102800.0
440.0550ZN VITI TRILOBATE 5X50 TC+ UNI 8112 ZINCATE Cr.3 106380.0
440.0555ZN VITI TRILOBATE 5X55 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0560ZO VITI TRILOBATE 5X60 TC+ UNI 8112 Z.NERE Cr.3 0.0
440.0608ZN VITI TRILOBATE 6X 8 TC+ UNI 8112 ZINCATE Cr.3 194600.0
440.0610ZN VITI TRILOBATE 6X10 TC+ UNI 8112 ZINCATE Cr.3 216850.0
440.0610ZO VITI TRILOBATE 6X10 TC+ UNI 8112 ZINCATE NERE Cr.3 0.0
440.0612ZN VITI TRILOBATE 6X12 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0612ZO VITI TRILOBATE 6X12 TC+ UNI 8112 Z.NERO Cr.3 0.0
440.0615ZN VITI TRILOBATE 6X15 TC+ UNI 8112 ZINCATE Cr.3 57150.0
440.0615ZO VITI TRILOBATE 6X15 TC+ UNI 8112 Z.NERO Cr.3 0.0
440.0618TT VITI TRILOBATE 6X18 TC+ UNI 8112 ZINCATE Cr.3 + TORQUE TENSION 30% 0.0
440.0620ZN VITI TRILOBATE 6X20 TC+ UNI 8112 ZINCATE Cr.3 160440.0
440.0620ZO VITI TRILOBATE 6X20 TC+ UNI 8112 Z.NERE Cr.3 0.0
440.0625ZN VITI TRILOBATE 6X25 TC+ UNI 8112 ZINCATE Cr.3 101950.0
440.0630ZN VITI TRILOBATE 6X30 TC+ UNI 8112 ZINCATE Cr.3 36000.0
440.0635ZN VITI TRILOBATE 6X35 TC+ UNI 8112 ZINCATE Cr.3 28800.0
440.0640ZN VITI TRILOBATE 6X40 TC+ UNI 8112 ZINCATE Cr.3 209000.0
440.0645ZN VITI TRILOBATE 6X45 TC+ UNI 8112 ZINCATE Cr.3 178000.0
440.0650ZN VITI TRILOBATE 6X50 TC+ UNI 8112 ZINCATE Cr.3 199500.0
440.0812ZN VITI TRILOBATE 8X12 TC+ UNI 8112 ZINCATE Cr.3 6810.0
440.0812ZO VITI TRILOBATE 8X12 TC+ UNI 8112 Z.NERO Cr.3 0.0
440.0815ZN VITI TRILOBATE 8X15 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0816ZN VITI TRILOBATE 8X16 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0816ZO VITI TRILOBATE 8X16 TC+ UNI 8112 Z.NERO Cr.3 0.0
440.0820ZN VITI TRILOBATE 8X20 TC+ UNI 8112 ZINCATE Cr.3 925.0
440.0825ZN VITI TRILOBATE 8X25 TC+ UNI 8112 ZINCATE Cr.3 0.0
440.0830ZN VITI TRILOBATE 8X30 TC+ UNI 8112 ZINCATE Cr.3 22050.0
440.0835ZN VITI TRILOBATE 8X35 TC+ UNI 8112 ZINCATE Cr.3 75000.0
440.0840ZN VITI TRILOBATE 8X40 TC+ UNI 8112 ZINCATE Cr.3 94100.0