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  4. BS EN 14399-4 Specification

BS EN 14399-4 HV Bolting Assemblies

BS EN 14399-4 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 14399-4 Dimensions

Dimensions of bolts

Thread(d) M12 M16 M20 M22 M24 M27 M30 M36
Pb 1,75 2 2,5 2,5 3 3 3,5 4
b(ref.) c 23 28 33 34 39 41 44 52
d 0,4 0,4 0,4 0,4 0,4 0,4 0,4 0,4
e 0,6 0,6 0,8 0,8 0,8 0,8 0,8 0,8
c max. 15,2 19,2 24,0 26,0 28,0 32,0 35,0 41,0
min. 12 16 20 22 24 27 30 36
da max. 11,30 15,30 19,16 21,16 23,16 26,16 29,16 35,00
d max. 12,70 16,70 20,84 22,84 24,84 27,84 30,84 37,00
min. 20,1 24,9 29,5 33,3 38,0 42,8 46,6 55,9
d max. b b b b b b b b
min. 23,91 29,56 35,03 39,55 45,20 50,85 55,37 66,44
e min. 8 10 13 14 15 17 19 23
k nom. 7,55 9,25 12,10 13,10 14,10 16,10 17,95 21,95
max. 8,45 10,75 13,90 14,90 15,90 17,90 20,05 24,05
kw min. 5,28 6,47 8,47 9,17 9,87 11,27 12,56 15,36
min. 1,2 1,2 1,5 1,5 1,5 2,0 2,0 2,0
r min. 22 27 32 36 41 46 50 60
s max. 21,16 26,16 31,00 35,00 40,00 45,00 49,00 58,80
min. ls and lg c
l ls lg ls lg ls lg ls lg ls lg ls lg ls lg lg ls
min. max. min. max. min. max. min. max. min. max. min. max. min. max. min. max.
35 33,75 36,25 6,75 12                            
40 38,75 41,25 11,75 17 6 12                        
45 43,75 46,25 16,75 22 11 17 4,5 12                    
50 48,75 51,25 21,75 27 16 22 9,5 17 8,5 16                
55 53,5 56,5 26,75 32 21 27 14,5 22 13,5 21                
60 58,5 61,5 31,75 37 26 32 19,5 27 18,5 26 12 21            
65 63,5 66,5 36,75 42 31 37 24,5 32 23,5 31 17 26            
70 68,5 71,5 41,75 47 36 42 29,5 37 28,5 36 22 31 20 29        
75 73,5 76,5 46,75 52 41 47 34,5 42 33,5 41 27 36 25 34 20,5 31    
80 78,5 81,5 51,75 57 46 52 39,5 47 38,5 46 32 41 30 39 25,5 36    
85 83,25 86,75 56,75 62 51 57 44,5 52 43,5 51 37 46 35 44 30,5 41 21 33
90 88,25 91,75 61,75 67 56 62 49,5 57 48,5 56 42 51 40 49 35,5 46 26 38
95 93,25 96,75 66,75 72 61 67 54,5 62 53,5 61 47 56 45 54 40,5 51 31 43
100 98,25 101,75     66 72 59,5 67 58,5 66 52 61 50 59 45,5 56 36 48
105 103,25 106,75     71 77 64,5 72 63,5 71 57 66 55 64 50,5 61 41 53
110 108,25 111,75     76 82 69,5 77 68,5 76 62 71 60 69 55,5 66 46 58
115 113,25 116,75     81 87 74,5 82 73,5 81 67 76 65 74 60,5 71 51 63
120 118,25 121,75     86 92 79,5 87 78,5 86 72 81 70 79 65,5 76 56 68
125 123 127     91 97 84,5 92 83,5 91 77 86 75 84 70,5 81 61 73
130 128 132     96 102 89,5 97 88,5 96 82 91 80 89 75,5 86 66 78
135 133 137         94,5 102 93,5 101 87 96 85 94 80,5 91 71 83
140 138 142         99,5 107 98,5 106 92 101 90 99 85,5 96 76 88
145 143 147         104,5 112 103,5 111 97 106 95 104 90,5 101 81 93
150 148 152         109,5 117 108,5 116 102 111 100 109 95,5 106 86 98
155 153 159         114,5 122 113,5 121 107 116 105 114 100,5 111 91 103
160 158 164             118,5 126 112 121 110 119 105,5 116 96 108
165 163 169             123,5 131 117 126 115 124 110,5 121 101 113
170 168 174                 122 131 120 129 115,5 126 106 118
175 173 179                 127 136 125 134 120,5 131 111 123
180 178 184                 132 141 130 139 125,5 136 116 128
185 182,7 189,6                 137 146 135 144 130,5 141 121 133
190 187,7 194,6                 142 151 140 149 135,5 146 126 138
195 192,7 199,6                 147 156 145 154 140,5 151 131 143
200 197,7 204,6                     150 159 147,5 156 136 148
  • NOTE Preferred leng ths are defined in terms of leng ths ls ,m in and lg ,max.
  • a P is the p i tch of th read
  • b d w,max = s actua l
  • c lg ,max = lnom - b ls ,m in = lg ,max - 3P

Dimensions of nuts

Thread (d) M12 M16 M20 M22 M24 M27 M30 M36
Pa 1,75 2 2,5 2,5 3 3 3,5 4
ds max. 13,0 17,3 21,6 23,7 25,9 29,1 32,4 38,9
min. 12 16 20 22 24 27 30 36
dw max. b b b b b b  b b
min. 20,1 24,9 29,5 33,3 38,0 42,8 46,6 55,9
e min. 23,91 29,56 35,03 39,55 45,20 50,85 55,37 66,44
m nom = max. 10 13 16 18 20 22 24 29
min. 9,64 12,30 14,90 16,90 18,70 20,70 22,70 27,70
mw min. 7,71 9,84 11,92 13,52 14,96 16,56 18,16 22,16
s max. 22 27 32 36 41 46 50 60
min. 21,16 26,16 31,00 35,00 40,00 45,00 49,00 58,80

Specifications & reference standards

Specifications for bolts and reference standards

Material Steel
General requirements EN 14399-1 and EN 14399-2
Thread Tolerance class 6ga
International Standards ISO 261,ISO 965-2
Mechanical properties Property class 10.9
European Standard EN ISO 898-1
Tolerances Product grade C except for dimensions c and r Tolerance for leng ths ≥ 1 55 mm : + 7IT-1 /2 IT1 7
European Standard EN ISO 4759-1
Finish-Coatingb Uncoated As processedc
Hot dip galvanized EN ISO 10684
Others To be agreedd
Surface integrity Limits for surface discontinuities as specifiedin EN26157-1.
Acceptability For acceptance procedure,see EN ISO 3269.
  • a The to lerance class speci fied app l ies to bo l ts withou t or before any coating . Hot-dip galvanized bo l ts are in tended for assemb ly with nu ts tapped overs ize to 6AZ.
  • b Atten tion is d rawn to the need to cons ider the risk of hyd rogen embri ttlemen t in the case of bolts of property class 1 0 . 9 , when se lecting an appropria te su rface treatmen t process (e . g . clean ing and coating ) , see the re levan t coating standards .
  • c “As processed “ means the norma l fin ish resu l ting from manu facture with a l igh t coating of oil.
  • d Other coatings may be negotia ted be tween the pu rchaser and the manu facturer provided they do not impa i r the mechan ica l properties or the functiona l characteris tics . Coatings of cadmium or cadmium alloys are not perm i tted .

Specifications for nuts and reference standards

Material Steel
General requirements EN 14399-1 and EN 4399-2
Thread Coating of the bolt Uncoated Hot dip galvanized Others
Tolerance class of the nut 6H 6AZ 6Ha
International Standards ISO 261 , ISO 965-2 ISO 261 , ISO 965-2 ISO 261 , ISO 965-2 , ISO 965-5
Mechanical properties Property class 10
European Standard EN ISO 898-2
Tolerances Product grade B
European Standard EN ISO 4759-1
Finish-Coatingb Uncoated As processedb
Hot dip galvanized EN ISO 1 0684
Others To be agreed c
Surface integrity Limits for surface discontinuities as specified in EN ISO 61 57-2
Acceptability For acceptance procedure , see EN ISO 3269 .
  • a For other coatings that need an increased fundamental deviation and according to the relevant standard , oversize tapped nuts with a thread tolerance class up to 6AZ may be used .
  • b “As processed “ means the normal finish resulting from manufacture with a light coating of oil .
  • c Other coatings may be negotia ted between the pu rchaser and the manufacturer provided they do not impa i r the mechanical properties or the functional characteristics. Coatings of cadmium or cadmium alloys are not permitted .

BS EN 14399-4 Bolting Surface Treatment Specifications

BS EN 14399-4 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 14399-4 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 14399-4 Testing Standards

ASME Threading Specifications

BS EN 14399-4 Supplementary Requirements