BS EN 14399-6 Chamfered Washers

BS EN 14399-6 Composition of high-strength structural bolting assemblies and component marking

Type of bolting assembly System HR System HV System HRC
General requirements EN 14399-1
Suitability for preloading EN 14399-2 and, if any, additional testing specified in the product standard
Bolt and nut EN 14399-3 EN 14399-7 EN 14 399-4 EN 14399-8 EN 14399-10
Marking Bolt HR8.8 HR10.9 HR8 .8 HR10.9 HV10.9 HVP10.9 HRC 10.9
Nut HR8 or HR10 HR10 HR8 or HR 10 HR10 HV 10 HV 10 HR 10 HRD 10
Washers EN 1439 9-5 a or EN 14399-6 EN 14399-6 EN 14399-5 8 or EN 14399-6
Marking H or HRb H or HV b H or HRb H or HRb or HD c
Direct tension indicator and nut face washer or bolt face washer, if any EN 14399-9 Not applicable
Marking Direct tension indicator H8 H10 H8 H10 H10
Nut face washer HN HN
Bolt face washer HB Not applicable HB
  • a EN 14399-5 can on ly be used under the nu t.
  • b At the choice of the manufacturer.
  • c Manda tory mark for washers with en larged outer d iame ter according to EN 14399-5 only

BS EN 14399-6 Dimensions

Nominal size d (nominal thread diameter of associated bolts) 12 (14)a 16 (18)a 20 22 24 27 30 36
d3 min. 13 15 17 19 21 23 25 28 31 37
max. 13,27 15,27 17,27 19,33 21,33 23,33 25,33 28,52 31,62 37,62
d1 min. 23,48 27,48 29,48 33,38 36,38 38,38 43,38 49,00 54,80 64,80
max. 24 28 30 34 37 39 44 50 56 66
h nom. 3 3 4 4 4 4 4 5 5 6
min. 2,7 2,7 3,7 3,7 3,7 3,7 3,7 4,4 4,4 5,4
max. 3,3 3,3 4,3 4,3 4,3 4,3 4,3 5,6 5,6 6,6
e nom.= min . 0,5 0,5 0,75 0,75 0,75 0,75 0,75 1 1 1,25
max. 1,0 1,0 1,5 1,5 1,5 1,5 1,5 2,0 2,0 2,5
c min. 1,6 1,6 1,6 2,0 2,0 2,0 2,0 2,5 2,5 2,5
max. 1,9 1,9 1,9 2,5 2,5 2,5 2,5 3,0 3,0 3,0
  • a Sizes in brackets are non-preferred sizes.

BS EN 14399-6 Specifications and reference standards

Material Steel
General requirements EN 14399-1 and EN 14399-2
Mechanical properties Hardness range 300 HV to 370 HV
Tolerances Product grade A
European Standard EN ISO 4759-3
Finish-Coatinga Uncoated as processedb
Hot dip galvanized EN ISO 10684
Others to be agreedc
Workmanship Parts shall be uniform and free of irregularities or detrimental defects. No protruding burrs shall appear on the washer.
Acceptability For acceptance procedure, see EN ISO 3269.
  • a Attention is drawn to the need to consider the risk of hydrogen embrittlement when selecting an appropriate surface treatment process (e.g. cleaning and coating), see relevant coating standards.
  • b “As processed“ means the normal finish resulting from heat treatment with a residual coating of light oil.
  • c Other coatings may be negotiated between the purchaser and the manufacturer provided they do not impair the mechanical properties or the functional characteristics. Coatings of cadmium or cadmium alloys are not permitted.

BS EN 14399-6 Heat Treatment

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BS EN 14399-6 Bolting Surface Treatment Specifications

BS EN 14399-6 Bolting Components Marking

Product Shall be Marked with our manufacturing trade mark "TorqBolt" or "TB" along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.

ASME Dimensional Standards

BS EN 14399-6 Bolting Certifications

  • EN 10204 3.1
  • EN 10204 3.2
  • PED 2014/68/EC
  • MERKBLATT AD 2000 W2/W7/W10
  • API 20 E BSL 1/ BSL 2
  • NACE MR 0175
  • NACE MR 0103

BS EN 14399-6 Testing Standards

ASME Threading Specifications

BS EN 14399-6 Supplementary Requirements