EN 14399 Preload bolt assemblies (CE Marked) High-strength
Andrews Fasteners Limited
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EN 14399 Preload bolt assemblies (CE Marked)

EN 14399-3 Preload bolt assemblies (HR)

High-strength structural bolting assemblies for preloading

Previously know as High Strength Friction Grip (HSFG)

We are a manufacturer of CE Marked pre-loaded fasteners to EN 14399. In our facility in Leeds, we can CE Approve – assembly test to EN 14399-2 HR Assemblies from M12 to M36 up to grade 10.9. We are regularly independently assessed by LRQA, to make sure, that our company is fully comliant with EN 14399 requirements.

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 EN 14399-9. For grade 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.

EN 14399-9 DIRECT TENSION INDICATORS (DTI)

Direct tensions indicator washers (DTI) to EN 14399-9 are supplied with k-Class k0 HR 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.

EN 14399-7 COUNTERSUNK BOLTS (HR CSK)

We are approved to supply CE Marked Countersunk head assemblies. These assemblies include Countersunk slotted round head bolt (90-degree angle) to EN 14399-7 together with Hexagon head nut to EN 14399-7/3 and washers to EN 14399-5/6. HR CSK assemblies are tested according to EN 14399-2 requirements and CE Marked. Assemblies to k-Class k0 supplied are with DTI washers to EN 14399-9 and nut face washers to EN 14399-9 (for grade 10.9).

We are offering CE pre-loaded assemblies HR and HR CSK from M12 up to M36 with shortest lead time on the market and possibility to manufacture assemblies based on customer requirements to specified length and grade.

Description Specification Size range Availability
Hexagon Bolts (HR) EN 14399 Part 3
Alternative to BS 4395-1 4395-2
ASTM A325M & ASTM A490M, DIN 6914
M12 – M36
Hexagon Nut – fullnut (HR) EN 14399 Part 3 & 7
Alternative to BS 4395-1 4395-2, ASTM A563M, DIN 6915
M12 – M36
ce-logo-transparent-minHR Assembly
Hexagon Bolt, Nut, Washer
EN 14399-1
Bolt assembly for preloading for use in accordance with a defined k-class
M12 – M36
Countersunk Bolts (HR) EN 14399 Part 7 M12 – M36
ce-logo-transparent-minHR CSK Assembly
Countersunk bolt, Nut, Washer
EN 14399-1
Bolt assembly for preloading for use in accordance with a defined k-class
M16 – M30
Hardened Washers
min. 300 HV
EN 14399 Part 5 & 6
Alternative to BS 4395 PT1 & PT2, ASTM A436M, DIN 6916 & 6917 & 6918
M12 – M36
Bolt Face / Nut Face Washers EN 14399 Part 9
Alternative to BS 7644-2
M12 – M36
Direct Tension Indicators Washers (DTI Washers) EN 14399 Part 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

EN 14399-3 Hexagon Head Bolt 6g EN 14399-3 Nut
EN 14399-7 Nut
S/C, BZP HDG SHER*
EN 14399-7 Countersunk Bolt 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 Part 6
SHER / SHERA
Sherardized
Vapour galvanising
EN ISO 17668
EN 13811
BS 7371 Part 8
BS 4921
BZP
Bright Zinc Plated
EN ISO 4042
BS 7371 Part 3
MZP
Mechanical Applied Coating
(Galvanized/Zinc)
BS 7371 Part 7

Looking for ASTM Alternative (A325M, A490M, A563M, F436M)?

Look in our comparison article to EN 14399 Pre-load bolt assemblies.

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