TR Security Machine Screws Type 3 – Countersunk Head
Materials & Finishes
Steel 4.8, Zinc & clear plated
Stainless steel, Self colour
Note: Due to the fact that fastening applications differ greatly, the below information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.
| d | M3 | M4 | M5 | M6 |
| D nom (mm) | 5.6 | 7.5 | 9.2 | 11 |
| H max (mm) | 1.65 | 2.2 | 2.5 | 3 |
Key Features
Round profile with three wing recessed drive system suitable for high risk security applications providing technical appeal and power driver installation. Removable by dedicated driver only. Suited to both surface and recessed applications.
TR Security Drivers
Our range of drivers and drive bits are available from stock but only to bona fide purchasers of TR Security fasteners and can only be purchased separately if fasteners have been previously been supplied.
Please note: Most security screws are not manufactured to DIN or ISO standards and head dimensions can vary considerably from manufacturer to manufacturer. If head dimensions are critical, please specify at time of order.
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| Preferred size / availability | Part number | Finish | Length | Material | Head Style | Thread | |
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