BS EN 14399-3 Hexagon bolting assemblies for preloading (HR)
Previously known as High Strength Friction Grip (HSFG)
We are a manufacturer of UKCA & CE Marked pre-loaded fasteners to BS EN 14399. In our facility in Leeds, we can UKCA & CE Approve – assembly test to BS EN 14399-2 HR Assemblies from M12 to M36 up to grade 10.9. We are regularly independently assessed by Lloyd’s Register / LRQA, to make sure, that our company is fully compliant with BS EN 14399 requirements.
Typical assemblies to BS EN 14399 include hexagon head bolt (HR Bolt) to BS EN 14399-3 , hexagon nut to EN 14399-3 and hard washer to BS EN 14399-5 (used under the nut) or chamfered hard washer BS EN 14399-6 (usually used under bolt head). Additionally, for full compliance with k-Class k0, our company supply Direct Tensions Indicator washers to BS EN 14399-9 . For grade 10.9 assemblies, together with DTI washers supplied are hard washers (bolt face or nut face washers) to BS EN 14399-9 which are used on top of the DTI washer.
BS EN 14399-7 Countersunk Bolts (HR CSK)
We are approved to supply UKCA & CE Marked Countersunk head bolting assemblies. These assemblies include Countersunk slotted round head bolt (90-degree angle) to BS EN 14399-7 together with Hexagon head nut to BS EN 14399-7/3 and washers to BS EN 14399-5/6. HR CSK assemblies are tested according to BS EN 14399-2 requirements and UKCA & CE Marked. Assemblies to k-Class k0 supplied are with DTI washers to BS EN 14399-9 and nut face washers to BS EN 14399-9 (for grade 10.9).
We are offering UKCA & CE pre-loaded assemblies HR from M12 up to M36 and HR CSK from M16 up to M30 with shortest lead time on the market and possibility to manufacture assemblies based on customer requirements to specified length and grade.
BS EN 14399-9 Direct Tension Indicators (DTI)
Direct tensions indicator washers (DTI) to BS EN 14399-9 are supplied with k-Class k0 HR and HR CSK assemblies. DTI washers are used during tightening of the assemblies, to ensure, that correct force for pre-loaded fasteners is achieved. DTI washers reduce necessary to use Torque figures and risk of over-tightening of the assemblies.
Description | Specification | Size range |
---|---|---|
Hexagon Bolts (HR) | BS EN 14399-3 Alternative to BS 4395-1, BS 4395-2, ASTM A325M & ASTM A490M, DIN 6914 | M12–M36 |
Hexagon Nut – fullnut (HR) | BS EN 14399-3 & 14399-7 Alternative to BS 4395-1, BS 4395-2, ASTM A563M, DIN 6915 | M12–M36 |
HR Assembly Hexagon Bolt, Nut, Washer | BS EN 14399-1 Bolt assembly for preloading for use in accordance with a defined k-class | M12–M36 |
Countersunk Bolts (HR) | BS EN 14399-7 | M12–M36 |
HR CSK Assembly Countersunk bolt, Nut, Washer | BS EN 14399-1 Bolt assembly for preloading for use in accordance with a defined k-class | M16 – M30 |
Hardened Washers min. 300 HV | BS EN 14399-5 & 14399-6 Alternative to BS 4395-1, BS 4395-2, ASTM A436M, DIN 6916 & 6917 & 6918 | M12–M36 |
Bolt Face / Nut Face Washers | BS EN 14399-9 Alternative to BS 7644-2 | M12–M36 |
Direct Tension Indicators Washers (DTI Washers) | BS EN 14399-9 Alternative to BS 7644-1, ASTM F959M | M12–M36 |
Size range available
Diameter | M12 | (M14) | M16 | (M18) | M20 | M22 | M24 | M27 | M30 | M36 |
() - These sizes are rarely available and are made on special request (min. 1 pallet quantity may be required).
Thread Classes
S/C, BZP | HDG | SHER* | |||
---|---|---|---|---|---|
BS EN 14399-3 Hexagon Head Bolt | 6g | BS EN 14399-3 Nut | 6H | 6AZ | 6AZ |
BS EN 14399-7 Countersunk Bolt | 6g | BS EN 14399-7 Nut | 6H | 6AZ | 6AZ |
*) Recommendation of the sherardizer
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 |
EN 14399 Pre-load Bolt Assembly (CE Marked) Bolt to EN 14399-3, Nut to EN 14399-3, Washer to EN 14399-6 Assembly Tested to EN 14399-2
EN 14399 Pre-load Bolt Assembly (CE Marked) Bolt to EN 14399-3, Nut to EN 14399-3, Washer to EN 14399-6 Direct Tension Indicators Washer EN 14399-9 Assembly Tested to EN 14399-2
EN 14399 Pre-load bolt head marking 20A80 FAST 8.8HR
EN 14399 Part 7 Countersunk Head Bolt FAST 10.9 HR
EN 14399 Pre-load bolt assembly HR BZP
EN 14399 Pre-load Bolt Assembly (CE Marked) Bolt to EN 14399-3, Nut to EN 14399-3, Washer to EN 14399-6 Direct Tensions Indicators Washer to EN 14399-9 Assembly Tested to EN 14399-2
M30 HR 14399-3 Nut Galvanised (HDG)
EN 14399 Pre-load Bolt Assembly (CE Marked) Bolt to EN 14399-3, Nut to EN 14399-3, Washer to EN 14399-6 Assembly Tested to EN 14399-2
EN 14399 Pre-load bolt assembly HR BZP
EN 14399 Pre-load Countersunk Bolt Assembly (CE Marked) Galvanised
EN 14399 Pre-load Countersunk Bolt Assembly (CE Marked) Galvanised
EN 14399 Pre-load Countersunk Bolt Assembly (CE Marked) Self Colour
EN 14399 Pre-load Countersunk Bolt Assembly (CE Marked) Self Colour
Looking for ASTM Alternative (A325M, A490M, A563M, F436M)?
Look in our comparison article to EN 14399 Pre-load bolt assemblies.