UNI 5738 Partially Threaded Hex Cap Screw

Equivalent Standards

UNI 5738

Dimensions for Partially Threaded Hex Cap Screw

Thread d b c da ds dw e k k r s
l<125mm 125mm>
l<200mm
l>200mm min. max. max. max. min. min. min. nominal Product grade A Product grade B min. min. nominal = max min.
Product Grade A Product Grade B Product Grade A Product Grade B Product Grade A Product Grade B min. max. min. max. Product Grade A Product Grade B
M8x1 -- 22 28 41 0.15 0.6 9.2 8 7.78 7.64 11.6 11.4 14.38 14.2 5.3 5.15 5.45 5.06 5.54 3.54 0.4 13 12.73 12.57
M10x1 M10x1.25 26 32 45 0.15 0.6 11.2 10 9.78 9.64 15.6 15.4 18.9 18.72 6.4 6.22 6.58 6.11 6.69 4.28 0.4 17 16.73 16.57
M12x1.5 M12x1.25 30 36 49 0.15 0.6 13.7 12 11.73 11.57 17.4 17.2 21.1 20.88 7.5 7.32 7.68 7.21 7.79 5.05 0.6 19 18.67 18.48
M14x1.5 -- 34 40 53 0.15 0.6 15.7 14 13.73 13.57 20.5 20.1 24.49 23.91 8.8 8.62 8.96 8.51 9.09 5.96 0.6 22 21.67 21.16
M16x1.5 -- 38 44 57 0.2 0.8 17.7 16 15.73 15.57 22.5 22 26.75 26.17 10 9.82 10.18 9.81 10.29 6.8 0.6 24 23.67 23.16
M18x2 M18x1,5 42 48 61 0.2 0.8 20.2 18 17.73 17.57 25.3 24.8 30.14 29.56 11.5 11.28 11.72 11.15 11.85 7.8 0.6 27 26.67 26.16
M20x1.5 M20x2 46 52 65 0.2 0.8 22.4 20 19.67 19.48 28.2 27.7 33.53 32.95 12.5 12.28 12.72 12.15 12.85 8.5 0.8 30 29.67 29.16
M22x2 M22x1.5 50 56 69 0.2 0.8 24.4 22 21.67 21.48 30 29.5 35.72 35.03 14 13.78 14.22 13.65 14.35 9.6 0.8 32 31.61 31
M24x2 M24x1.5 54 60 73 0.2 0.8 26.4 24 23.67 23.48 33.6 33.2 39.98 39.55 15 14.78 15.22 14.65 15.35 10.3 0.8 36 35.38 35
Thread d b c da ds dw e k k r s
l<125mm 125mm>
l<200mm
200mm min. max. max. max. min. min. min. nominal min max min. min. nominal = max min.
M27x2 -- 60 66 79 0.2 0.8 30.4 27 26.48 38 45.2 17 16.65 17.35 11.7 1 41 40
M30x2 -- 66 72 85 0.2 0.8 33.4 30 29.48 42.7 50.85 18.7 18.28 19.12 12.8 1 46 45
M33x2 -- 72 78 91 0.2 0.8 36.4 33 32.38 46.6 55.37 21 20.58 21.42 14.4 1 50 49
M36x3 -- 78 84 97 0.2 0.8 39.4 36 35.38 51.1 60.79 22.5 22.08 22.92 15.5 1 55 53.8
M39x3 -- 84 90 103 0.3 1 42.4 39 38.38 55.9 66.44 25 24.58 25.42 17.2 1 60 58.8
M42x3 -- 90 96 109 0.3 1 45.6 42 41.38 59.9 71.3 26 25.58 26.42 17.9 1.2 65 63.1
M45x3 -- 96 102 115 0.3 1 48.6 45 44.38 64.7 76.95 28 27.58 28.42 19.3 1.2 70 68.1
M48x3 -- 102 106 121 0.3 1 52.6 48 47.38 69.4 82.6 30 29.58 30.42 20.9 1.6 75 73.1
M52x3 -- - 116 129 0.3 1 56.6 52 51.26 74.2 88.25 33 32.5 33.5 22.8 1.6 80 78.1

Thread Length Requirement for UNI 5738 Hex Head Bolts

Thread d M8x1 M10x1 M12x1.5 M14x1.5 M16x1.5 M18x2 M20x1.5 M22x2 M24x2 M27x2 M30x2 M33x2 M36x3 M39x3 M42x3 M45x3 M48x3 M52x3
- M10x1.25 M12x1.25 - - M18x1.5 M20x2 M22x1.5 M24x1.5 - - - - - - - - -
l Product grade  
A B ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg
Nominal min max min max min max min max min max min max min max min max min max min max min max min max min max min max min max min max min max min max min max min max
35 34.5 35.5 - - 8 13
40 39.5 40.5 - - 13 18 7.75 14
45 44.5 45.5 - - 18 23 12.75 19 7.5 15
50 49.5 50.5 - - 23 28 17.75 24 12.5 20 8.5 16
55 54.4 55.6 - - 28 33 22.75 29 17.5 25 13.5 21 9.5 17
60 59.4 60.6 - - 33 38 27.75 34 22.5 30 18.5 26 14.5 22
65 64.4 65.6 - - 38 43 32.75 39 27.5 35 23.5 31 19.5 27 13 23 9 19
70 69.4 70.6 - - 43 48 37.75 44 32.5 40 28.5 36 24.5 32 18 28 14 24 10 20
75 74.4 75.6 - - 48 53 42.75 49 37.5 45 33.5 41 29.5 37 23 33 19 29 15 25
80 794 80.6 - - 53 58 47.75 54 42.5 50 38.5 46 34.5 42 28 38 24 34 20 30 16 26
85 84.3 85.7 83.25 88.75 58 63 52.75 59 47.5 55 43.5 51 39.5 47 33 43 29 39 25 35 21 31
90 89.3 90.7 88.25 91.75 63 68 57.75 64 52.5 60 48.5 56 44.5 52 38 48 34 44 30 40 26 36 20 30 14 24
95 94.3 95.7 93.25 93.75 68 73 62.75 69 57.5 65 53.5 61 49.5 57 43 53 39 49 35 45 31 41 25 35 19 29
100 99.3 100.7 98.25 101.75 73 79 67.75 74 62.5 70 58.5 65 54.5 62 48 58 44 54 40 50 36 46 30 40 24 34 18 28
110 109.3 110.7 108.25 111.75 77.75 84 72.5 80 68.5 76 64.5 72 58 68 54 64 50 60 46 56 40 50 34 44 28 38 17 32
120 119.3 120.7 118.25 121.75 87.75 94 82.5 90 78.5 86 74.5 82 68 78 64 74 60 70 56 66 50 60 44 54 38 48 27 42 21 36
130 129.2 130.8 128 132 91.75 98 86.5 94 82.5 90 76.5 86 72 82 68 78 64 74 60 70 54 64 48 58 42 52 31 46 25 40 19 34 13 28
140 139.2 140.8 138 142 101.75 108 96.5 104 92.5 100 88.5 96 82 92 78 88 74 84 70 80 64 74 58 68 52 62 41 56 35 50 29 44 23 38 17 32
150 149.2 150.8 148 152 111.75 118 106.5 114 102.5 110 98.5 106 92 102 88 98 84 94 80 90 74 84 68 78 62 72 51 66 45 60 39 54 33 48 27 42 19 34
160 159.2 160.8 158 162 116.5 124 112.5 12 108.5 116 102 112 98 108 94 104 90 100 84 94 78 88 72 82 61 76 55 70 49 64 43 58 37 52 29 44
170 169.2 170.8 168 172 126.5 134 122.5 130 118.5 126 112 122 108 118 104 114 100 110 94 104 88 98 82 92 71 86 65 80 59 74 53 68 47 62 39 54
180 179.2 180.8 178 182 136.5 144 132.5 140 128.5 136 122 132 118 128 114 124 110 120 104 114 98 108 92 102 81 96 75 90 69 84 63 78 57 72 49 64
190 189.08 190.92 187.7 192.3 142.5 150 138.5 146 132 142 128 138 124 134 120 130 114 124 108 118 102 112 91 106 85 100 79 94 73 88 67 82 59 74
200 199.08 200.92 197.7 202.3 152.5 160 148.5 156 142 152 138 148 134 144 130 140 124 134 118 128 112 122 101 116 95 110 89 104 83 98 77 92 69 84
220 217.7 222.3                 125 135 119 129 108 123 102 117 96 111 90 105 84 99 76 91
240 237.7 242.3                 145 155 139 149 128 143 122 137 116 131 110 125 104 119 96 111
260 257.4 262.6                 165 175 159 169 148 163 142 157 136 151 130 145 124 139 116 131
280 277.4 282.6                 179 189 168 183 162 177 156 171 150 165 144 159 136 151
300 297.4 302.6                 199 209 188 203 182 197 176 191 170 185 164 179 156 171