Content with tag EN 14399-3

Size (d) M12 M16 M20 M22 M24 M27 M30 M36 Pitch 1.75 2 2.5 2.5 3 3 3.5 4 dw 20.10-s 24.90-s 29.50-s 33.30-s 38.00-s 42.80-s 46.60-s 55.90-s e (min.) 23.91 29.56 35.03 39.55 45.20 50.85 55.37 66.44 m 10.37-10.8 14.10-14.8 16.90-18.0 18.10-19.4 20.20-21.5 22.50-23.8 24.30-25.6 29.40-31.0 c 0.4-0.8 0.4-0.8 0.4-0.8 0.4-0.8 0.4-0.8 0.4-0.8 0.4-0.8 0.4-0.8 s 21.16-22 26.16-27 31.00-32 35.00-36 40.00-41 45.00-46 49.00-50 58.80-60 Dimensions in millimetres For use with BS EN 14399 High-strength structural bolting assemblies for preloading DownloadPDF
Read more about BS EN 14399-3 Basic nuts dimensions (HR Nuts) ↬

Size (d) M12 M16 M20 M22 M24 M27 M30 M36 Pitch 1.75 2 2.5 2.5 3 3 3.5 4 b (l <=125) 30 38 46 50 54 60 66 78 b (125< l <=200 – 44 52 56 60 66 72 84 b (l >200) – – 65 69 73 79 85 97 ds 11.30-12.70 15.30-16.70 19.16-20.84 21.16-22.84 23.16-24.84 26.16-27.84 29.16-30.84 35.00-37.00 e (min) 23.91 29.56 35.03 39.55 45.20 50.
Read more about BS EN 14399-3 Basic bolt dimensions (HR Bolts) ↬

Thread d Nominal stress area of standard test mandarel (mm^2) Property Class 8 (N) Property Class 10 (N) M12 84.3 84300 97800 M16 157 157000 182100 M20 245 245000 284200 M22 303 303000 351200 M24 353 353000 409500 M27 459 459000 532400 M30 561 561000 650800 M36 817 817000 947700 The Proof Load values are based on stress of 1000 MPa for property class 8; and 1160 MPa for property class 10.
Read more about BS EN 14399-3 System HR - Proof Load values for Nuts ↬

The minimum thread length is calculated strictly according to EN 14399-3 for high-strength structural bolting assemblies for preloading - System HR and EN 14399-7 for high-strength structural countersunk bolting assemblies for preloading - System HR . In calculation, you need to consider standard reference thread length (b), minimum length of the shank - un-threaded part of the bolt, and distance from the head of the bolt till the first full thread.
Read more about What is the minimum thread length on high-strength structural bolting assemblies for preloading? ↬

HR should stand for High Resistance and HV for Hochfeste Bolzen mit Vorspannung (in English high resistance bolts for pretension). The second is an official description, and they should serve the same purpose. See also: What is the difference between HR and HV bolt assemblies?
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HR (British/French) bolt The British/French approach following BS EN 14399-3 and BS 4395 is to use thick nuts and long thread lengths in the bolt assembly to obtain ductility predominantly by plastic elongation of the bolt. The longer thread length is necessary to ensure that the induced strain is not localised. These bolts are relatively insensitive to overtightening during preloading although suite control is still important. Furthermore if severely over-tightened during preloading the ductile failure mode of the bolt assembly is predominantly by bolt breakage, which is readily detectable.
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We are offering wide range of Nuts (ISO, DIN and other standards) to various grades and finishes – washers from plain to special type of washers and springs. Our offer includes Product description Specification Hexagon Full Nut, Structural nut, High Nuts, UNC Nuts ISO 4032 DIN 934 DIN 6915 DIN 555 BS 3692 BS EN 14399-3 Hexagon Jam Nut, Lock nut, Half Nut, Thin Nut , Left hand thread nuts DIN 936 DIN 439
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Bolts, screws and other components what we can offer: Product description Specification Hexagon Socket Countersunk Head Screw, Socket Head Screws, Socket Screw DIN 7991 BS 4168-8 ISO 10642 Hexagon head bolts, Hexagon head screws DIN 7990 ISO 4017 ISO 4014 DIN 931 DIN 933 DIN 601 BS 3692 BS 4190 DIN 558 Hexagon Socket Cap Screw, low head socket cap screw ISO 4762 DIN 912 DIN 7984 BS 4168-1 DIN 960
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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.
Read more about BS EN 14399 High-strength structural bolting assemblies for preloading (CE & UKCA Marked) ↬