Preload Bolts Assemblies (HR)

We are the manufacturer of pre-loaded fasteners to EN 14399. We supply assemblies from M12 to M36 with grade 8.8 & 10.9. Typical assemblies to EN 14399 include hexagon head bolt (HR Bolt) to EN 14399-3, hexagon nut to EN 14399-3 and hard washer to EN 14399-5 (used under nut) or EN 14399-6 (usually used under bolt head). Additionally, for full compliance with k-Class k0, our company supply Direct Tensions Indicator washers to EN14399-9. For grade 8.8 & 10.9 assemblies, together with DTI washers supplied are hard washers (bolt face or nut face washers) to EN 14399-9 which are used on top of the DTI washer.