164


UNI 9708/TA

HI-LO SCREWS FOR PLASTIC MATERIALS HALF ROUND FAKE WASHER PHILIPS CROSS IMPRESSION WITH POINT
The Hi-Lo screw is easily distinguishable from any other screw due to the characteristic alternation of the thread between high (high) and low (low). It was one of the first screws designed specifically for plastics, especially for very soft materials such as nylon, moplen and the like. The highest thread at 30 ° is the one in charge of ensuring the tightness of the screw in the plastic material, while the smaller one should serve to create a blocking action of the screw by virtue of the different angle at 60 °. In practice, the product behaves like the double-principle rapid-fix "cousin" used in the wood sector: the idea for a screw with similar sealing characteristics, but on plastic materials, developed from the latter. Just like its like, the critical points of this article are varied and should be considered more often in the design phase, so that this screw can be used on a broader spectrum in a much more conscious way as it happens for Plastic-Fix (art. 105 and derivatives). Analyzing the difficulties of the screw, for example, in our experience we have had to deal with plastic products whose pre-hole being too large (this due to the needs of molding and blowing of the plastic) did not allow the lower thread of the screw to comply with the locking action and / or in any case not to have any grip on the material. In fact, by working only one thread, the tightness of the screw is not as it was originally thought. A second case concerns the size of the head which, with the same nominal diameter of the stem, is far less than any other type of product for plastics: the most striking example is found in the 3.5mm diameter screw whose head has a diameter of 5.6mm and with cross 1 instead of 7mm and with cross 2 as in all the others. An apparent strength of the product could be seen in the double step that allows a faster screwing than a normal screw for plastic: unfortunately this value becomes negative when looking at the tightness of the product with the same tightening torque.
The pros and cons of Hi-Lo are these, but not only: for this reason we always recommend contacting the office for more comprehensive and targeted advice.

The half-round head with the fake washer favors a wider sealing surface, while the low profile and without edges makes them particularly suitable for "visible" applications.

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

Code Description Availability Certifications Request offer
164.02512ZN VITI HI-LO 2.5X12 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.03008ZN VITI HI-LO 3X8 TFUFR+ PH UNI 9708 ZINCATE Cr.3 248000.0
164.03010ZN VITI HI-LO 3X10 TFUFR+ PH UNI 9708 ZINCATE Cr.3 315600.0
164.03012ZN VITI HI-LO 3X12 TFUFR+ PH UNI 9708 ZINCATE Cr.3 240850.0
164.03014ZN VITI HI-LO 3X14 TFUFR+ PH UNI 9708 ZINCATE Cr.3 145000.0
164.03016ZN VITI HI-LO 3X16 TFUFR+ PH UNI 9708 ZINCATE Cr.3 223300.0
164.03018ZN VITI HI-LO 3X18 TFUFR+ PH UNI 9708 ZINCATE Cr.3 182000.0
164.03020ZN VITI HI-LO 3X20 TFUFR+ PH UNI 9708 ZINCATE Cr.3 166000.0
164.03510ZN VITI HI-LO 3.5X10 TFUFR+ PH UNI 9708 ZINCATE Cr.3 117600.0
164.03512ZN VITI HI-LO 3.5X12 TFUFR+ PH UNI 9708 ZINCATE Cr.3 284000.0
164.03512ZO VITI HI-LO 3.5X12 TFUFR+ PH UNI 9708 ZINCATE NERE Cr.3 0.0
164.03514ZN VITI HI-LO 3.5X14 TFUFR+ PH UNI 9708 ZINCATE Cr.3 210500.0
164.03516ZN VITI HI-LO 3.5X16 TFUFR+ PH UNI 9708 ZINCATE Cr.3 260050.0
164.03518ZN VITI HI-LO 3.5X18 TFUFR+ PH UNI 9708 ZINCATE Cr.3 198999.0
164.03520ZN VITI HI-LO 3.5X20 TFUFR+ PH UNI 9708 ZINCATE Cr.3 188000.0
164.04006ZN VITI HI-LO 4X6 TFUFR+ PH UNI 9708 ZINCATE Cr.3 160900.0
164.04008ZN VITI HI-LO 4X8 TFUFR+ PH UNI 9708 ZINCATE Cr.3 160000.0
164.04010ZN VITI HI-LO 4X10 TFUFR+ PH UNI 9708 ZINCATE Cr.3 160000.0
164.04012ZN VITI HI-LO 4X12 TFUFR+ PH UNI 9708 ZINCATE Cr.3 106550.0
164.04014ZN VITI HI-LO 4X14 TFUFR+ PH UNI 9708 ZINCATE Cr.3 127000.0
164.04016ZN VITI HI-LO 4X16 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.04016ZO VITI HI-LO 4X16 TFUFR+ PH UNI 9708 Z.NERE Cr.3 0.0
164.04018ZN VITI HI-LO 4X18 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.04020ZN VITI HI-LO 4X20 TFUFR+ PH UNI 9708 ZINCATE Cr.3 350050.0
164.04025ZN VITI HI-LO 4X25 TFUFR+ PH UNI 9708 ZINCATE Cr.3 55000.0
164.04516ZN VITI HI-LO 4.5X16 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.04520ZN VITI HI-LO 4.5X20 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.04525ZN VITI HI-LO 4.5X25 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.04530ZN VITI HI-LO 4.5X30 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.04535ZN VITI HI-LO 4.5X35 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.04540ZN VITI HI-LO 4.5X40 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.04545ZN VITI HI-LO 4.5X45 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.04550ZN VITI HI-LO 4.5X50 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.05012ZN VITI HI-LO 5X12 TFUFR+ PH UNI 9708 ZINCATE Cr.3 105000.0
164.05014ZN VITI HI-LO 5X14 TFUFR+ PH UNI 9708 ZINCATE Cr.3 115800.0
164.05016ZN VITI HI-LO 5X16 TFUFR+ PH UNI 9708 ZINCATE Cr.3 97800.0
164.05018ZN VITI HI-LO 5X18 TFUFR+ PH UNI 9708 ZINCATE Cr.3 108000.0
164.05020ZN VITI HI-LO 5X20 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.05025ZN VITI HI-LO 5X25 TFUFR+ PH UNI 9708 ZINCATE Cr.3 66550.0
164.05030ZN VITI HI-LO 5X30 TFUFR+ PH UNI 9708 ZINCATE Cr.3 0.0
164.05540ZO VITI HI-LO 5.5X40 TFUFR+ PH UNI 9708 ZINCATE NERE Cr.3 0.0
164.06018ZN VITI HI-LO 6X18 TFUFR+ PH UNI 9708 ZINCATE Cr.3 27000.0
164.06020ZN VITI HI-LO 6X20 TFUFR+ PH UNI 9708 ZINCATE Cr.3 85550.0
164.06025ZN VITI HI-LO 6X25 TFUFR+ PH UNI 9708 ZINCATE Cr.3 44000.0
164.06030ZN VITI HI-LO 6X30 TFUFR+ PH UNI 9708 ZINCATE Cr.3 94600.0