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 8.8 grade assemblies;
- Direct Tension Indicators (DTI) retain their accuracy regardless of their surface condition during tightening, be they oiled, coated or even rusted.
- DTIs provide assurance of slip resistance.
Product Range
| Description | Specification | Size range | Availability |
|---|---|---|---|
| Direct Tension Indicators Washers (DTI Washers) | EN 14399-9 Alternative to BS 7644-1, ASTM F959M | M12–M36 |
Finishes available
| Finish | Specification |
|---|---|
| S/C Self Colour | Bare / Blackened (Black Oxide) Lightly Oiled |
| HDG Hot Dip Galvanised | EN ISO 10684 EN 1461 BS 7371-6 |
| SHER / SHERA Sherardized Vapour galvanising | EN ISO 17668 EN 13811 BS 7371-8 BS 4921 |
| BZP Bright Zinc Plated | EN ISO 4042 BS 7371-3 |
| MZP / MG Mechanical Applied Coating (Galvanized/Zinc) | BS 7371-7 ASTM B695 |
For technical information and advice on the use of Direct Tension Indicators Washers supplied by Andrews Fasteners please see our Technical Support Page .