Content with Quality

12 January 2022
We understand the difficulties by the end-users and purchasing departments in choosing the right components for different installation methods of High-strength structural bolting assemblies for preloading (HR). Different installation methods and product grades may require additional components like DTI washers, hardened washers, bolt face or nut face washers. Sometimes, the number and type of component change, depending on which part is rotated (the nut or the bolt head). We have prepared the HR configurator below to simplify this task.
Read more about BS EN 14399 (HR) Configurator

22 November 2021
Chemical Composition As per DIN 267-4 Class C max. Mn min. P max. S max. 4, 5 and 6 0.50 - 0.110 0.150 8 0.58 0.30 0.060 0.150 10 0.58 0.30 0.048 0.058 12 0.58 0.45 0.048 0.058 Mechanical Properties As per DIN 267-4 Property Class 4 Class 5 Class 6 Class 8 Class 10 Class 12 Proof load stress
Read more about DIN 267 Mechanical properties for Nuts

22 November 2021
DIN 934 Hexagon nuts – Basic dimensions Selected small sizes Dimension (d) M4 M5 M6 M8 M10 Thread pitch (pa) 0.7 0.8 1 1.25 1.5 m 2.9-3.2 3.7-4 4.7-5 6.14-6.5 7.64-8 dw (min) 5.8 6.8 8.8 11.3 15.3 s 6.78-7 7.78-8 9.78-10 12.73-13 16.73-17 e (min) 7.66 8.79 11.05 14.38 18.9 Selected standard sizes Dimension (d) M12 M16 M20 M22 M24 M27 M30 M33 M36 Thread pitch
Read more about DIN 934 Hexagon nuts - Basic dimensions

07 November 2021
Type FF – FloorFast – Lindapter Size Product Code Floorplate Thickness t [mm] Flange Thickness Standard [mm] Hexagon key [mm] M08 FF08 4.5-12 3-15 5 M10 FF10 5-12 3-15 6 M12 FF12 6-12 3-15 8 Type FF FloorFast - Datasheet & Installation Guide DownloadPDF
Read more about Lindapter FloorFast - basic dimensions

07 November 2021
Type LB2 – Lindibolt 2 – Lindapter Bolt Size Z Product Code Length Y [mm] Hole d [mm] Clamp length W [mm] Projection P [mm] M10 LB10 74 11-11.5 7-30 7.5-10 M12 LB12 85 13-13.5 10-36 9-12 M16 LB16 105 17-17.5 12-48 12-16 M20 LB20 128 21-21.5 14-60 15-20 M24 LB24 158 25-25.
Read more about Lindapter Lindibolt 2 - basic dimensions

22 July 2021
BS EN 14399 Part 5: Plain washers – Basic dimensions Selected sizes used for CE (UKCA) Marking under EN 14399 Size (d) M12 M16 M20 M22 M24 M27 M30 M36 d1 13-13,27 17-17,27 21-21,33 23-23,33 25-25,33 28-28,52 31-31,62 37-37,62 d2 23,48-24 29,48-30 36,38-37 38,38-39 43,38-44 49,00-50 54,80-56 64,80-66 h (nom.) 3 4 4 4 4 5 5 6 h 2,7-3,3 3,7-4,3 3,7-4,3 3,7-4,3 3,7-4,3 4,4-5,6 4,4-5,6 5,4-6,6 Dimensions in millimetres DownloadPDF
Read more about BS EN 14399-5 Plain washers - Basic dimensions

02 March 2021
When ordering Preloaded Assemblies (EN 14399-1) to be installed with Direct Tension Indicator Washers (DTI’s) , there are 4 different methods of how they can be installed. Depending on the access or preference, you may choose one method, over another. At the purchase stage, we may not know how you will be installing your assemblies. Please read below, as you may require an additional washer(s) to be purchased.
Read more about Do I need Bolt Face Washer or Nut Face Washer (EN 14399-9) with DTI's?

28 December 2020
List of Declarations of Performance for goods CE & UKCA marked from 1st January 2021 BS EN 15048 (CE 2814) Last update 01/01/2021 EN 15048 UIC/DOP No.: Zinc BZP Zinc BZP Galv. HDG Sherar. SHER Grade (Bolt/Nut) 8.8/8 8.8/10 8.8/10 8.8/10 M12 M12SB8.8/8BZP M12SB8.8/10BZP M12SB8.8/10HDG M12SB8.8/10SHER M16 M16SB8.8/8BZP M16SB8.8/10BZP M16SB8.8/10HDG M16SB8.8/10SHER M20 M20SB8.
Read more about Declaration of Performance

31 July 2018
Calculation of thread lengths Typical, unless specified in a product standard, dimensions for thread lengths (b) is calculated as follow: for l <= 125 mm: b = 2d + 6mm for 125 mm < l <= 200 mm: b = 2d + 12mm for l > 200mm: b = 2d + 25mm Where l is length of the bolt and b is the threaded part of the bolt.
Read more about ISO 888 Thread lengths for ISO metric fasteners (bolts)

23 July 2018
Dimensions of T-head (tee-head) bolt and nut Size in. A ±0,05 B +0,030 -0,074 C +0,25 -0,05 D* +3 -0 F H +0,00 –(as spec.) J +0,15 -0,03 R max. ⅝ x 3 1,50 0,625 3,0 2,00 0,625±0,04 1,062 -0,04 0,625 0,312 ¾ x 3½ 1,75 0,750 3,5 2,50 0,750±0,06 1,250 -0,06 0,750 0,375 ¾ x 4 1,75 0,750 4,0 3,00 0,750±0,06 1,250 -0,06 0,750 0,375 ¾ x 4½ 1,75 0,750 4,5 3,00 0,750±0,06 1,250 -0,06 0,750 0,375 ¾ x 5 1,75 0,750 5,0 3,00 0,750±0,06 1,250 -0,06 0,750 0,375 1 x 5½ 2,25 1,000 5,5 3,00 1,000±0,08 1,625 -0,08 1,000 0,500 1 x 6 2,25 1,000 6,0 3,00 1,000±0,08 1,625 -0,08 1,000 0,500 1¼ x 6 2,50 1,250 6,0 3,50 1,250±0,08 2,000 -0,08 1,250 0,625 1¼ x 6½ 2,50 1,250 6,5 3,5 1,250±0,08 2,000 -0,08 1,250 0,625 *) Bolts with dimension C longer than listed above are assumed to use the same thread length requirements as the longest specified.
Read more about Technical specification for T-head bolts (ANSI/AWWA C111/A21.11)