Content with Direct Tension Indicators Washers

29 March 2017
Andrews Fasteners is one of only few companies available on the local market, that is capable of manufacturing in the UK k-class K1 and K2 high strength structural preloaded bolt assemblies (System HR, EN 14399-1) for tightening with predefined torque values according to the k-factor. We are able to supply CE Marked preload bolt assemblies, for hexagon head and countersunk head bolts in k-class K2 for diameters M16 and M20 with the shortest lead time.
Read more about Preloaded assemblies k-Class K1 and K2 manufactured in the UK

08 April 2016
Direct Tension Indicators Washer – dimensions Dimensions of compressible washer-type direct tension indicator according to BS EN 14399-9:2018, Table 2. Size bolt diameter Internal diameter d1 External diameter d2 Thickness h1 Height over protrusion h2 Height of protrusions h3 Protrusion tangential diameter d3 Protrusion internal diameter d4 min max min max min max min max min M12 12,75 12,85 26,0 32,5 2,5 5,5 0,8 20,0 13,85 M16 16,75 16,85 35,0 36,8 3,0 6,0 0,8 25,0 17,85 M20 20,95 21,05 41,0 46,0 3,5 6,5 0,8 29,0 22,05 M22 23,05 23,15 46,5 50,6 4,0 7,0 0,8 33,0 24,15 M24 25,15 25,25 50,0 55,2 4,0 7,0 0,8 38,0 26,25 M27 28,30 28,40 54,0 62,1 4,0 7,0 0,8 43,0 29,40 M30 31,45 31,55 59,0 69,0 4,0 7,0 0,8 46,5 32,55 M36 37,75 37,85 78,0 83,0 4,0 7,5 0,8 56,0 38,85 Dimensions in millimetres DownloadPDF
Read more about BS EN 14399-9 Dimensions of Direct Tension Indicators washers

01 February 2015
Andrews Fasteners company in manufacturing Direct Tension Indicators Washers (DTI Washers) in well know in construction industry company based in United States – TurnaSure . All our washers are marked with our headmark FAST (previously AND.). Benefits of using Direct Tensions Indicators Washers: The use of DTIs is the simplest way of ensuring that bolting assemblies are tensioned properly; The use of DTIs saves cost on inspection ; No torque figures are required, only feeler gauges; Risk reduction on over tightening; DTIs are manufactured in compliance with EN 14399-9 and can be supplied with CE approved preload bolting assemblies; Unique curved protrusion design of Turnasure DTIs reduce necessary of using nut face / bolt face washers for 8.
Read more about Direct Tension Indicators Washers (BS EN 14399-9)