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High Tensile Fasteners

High Tensile Hex Bolt Manufacturers in India


High Tensile Fasteners

High Tensile Fasteners

High Tensile Hex Bolt

High Tensile Hex Bolt


Table of Content

Standard Specification Of High Tensile Fasteners

High Tensile Fasteners Grades Grade 10.9, Grade 8.8, DIN 933 Grade 12.9
High Tensile Fasteners Standard IS 1364 / IS 1363 & DIN EN ISO 4014 & 4017 DIN 931 / 933
High Tensile Fasteners Size Dia M 20 to 100 mm
Inch 3/4" to 3.1/2"
High Tensile Fasteners finish Zinc plated / Plain / Hot dip galvanised

List Of High Tensile Bolts Types

ASTM F568 HT Carriage Bolts

ASTM F568 HT Carriage Bolts

F568 High Tensile Lock Nut

F568 High Tensile Lock Nut

F568 HT Hex Nuts

F568 HT Hex Nuts

SF568 High Tensile Ogee Washers

SF568 High Tensile Ogee Washers

High Tensile Socket Head Cap Screw

High Tensile Socket Head Cap Screw

F568 High Tensile Spring Washers

F568 High Tensile Spring Washers

ASTM F568 High Tensile Lag Bolts

ASTM F568 High Tensile Lag Bolts

Grade F568 HT Wing Screw

Grade F568 HT Wing Screw


High Tensile Hex Bolt Dimension Chart

High Tensile Hex Bolt Dimension
DIA M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 M48 M52
Pitch 0.7 0.8 1 1.25 1.5 1.75 2 2.5 3 3.5 4 4.5 5
Grade A upto length 40 50 60 80 100 120 140 150 Grade A not applicable to these dia’s
Head Across Flat (S) Nom = Max Min Grade A Grade B 7 8 10 13 16 18 21 24 27 30 34 36 41 46 50 55 60 65 70 75 80
6.78 7.78 9.78 12.73 15.73 17.73 20.67 23.67 26.67 29.67 33.38 35.38 Grade A not applicable to these dia’s
6.64 7.64 9.64 12.57 15.57 17.57 20.16 23.16 26.16 29.16 33 35 40 45 49 53.8 58.8 63.1 68.1 73.1 78.1
Head Height (K) Nom Tol + or – Grade A Grade B 2.8 3.5 4 5.3 6.4 7.5 8.8 10 11.5 12.5 14 15 17 18.7 21 22.5 25 26 28 30 33
0.125 0.15 0.18 0.215 Grade A not applicable to these dia’s
0.2 0.24 0.29 0.35 0.42 0.5
Across corners e Min Grade A Grade B 7.66 8.79 11.05 14.38 17.77 20.03 23.36 26.75 30.14 33.53 37.72 39.98 Grade A not applicable to these dia’s
7.5 8.63 10.89 14.2 17.59 19.85 22.78 26.17 29.56 32.95 37.29 39.55 45.2 50.85 55.37 60.79 66.44 71.3 76.95 82.6 88.25
Thread Length (b) For lengths < or = 125mm For lengths > 125mm <= 200mm For lengths > 200mm 14 16 18 22 26 30 34 38 42 46 50 54 60 66 Not specified as full thread recommended
20 22 24 28 32 36 40 44 48 52 56 60 66 72 78 84 90 96 102 108 116
33 35 37 41 45 49 53 57 61 65 69 73 79 85 91 97 103 109 115 121 129
Major Dia at thread (min) 3.838 4.826 5.794 7.76 9.732 11.701 13.682 15.682 17.623 19.623 21.623 23.577 26.577 29.522 32.522 35.465 38.465 41.437 44.437 47.399 51.399
Major Dia at thread (max) 3.978 4.976 5.974 7.972 9.968 11.966 13.962 15.962 17.958 19.958 21.958 23.952 26.952 29.947 32.947 35.94 38.94 41.937 44.937 47.929 51.929

DIA 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2
BSW Pitch (TPI) 20 18 16 14 12 12 11 10 9 8 7 7 6 5 4.5
BSF PITCH (TPI) 26 22 20 18 16 16 14 12 11 10 9 9 8 8 7 7
Head Across Flat (S) Min Max 0.438 0.518 0.592 0.702 0.812 0.912 1.000 1.190 1.288 1.468 1.640 1.815 2.005 2.175 2.520 2.700
0.445 0.525 0.600 0.710 0.820 0.920 1.010 1.200 1.300 1.480 1.670 1.860 2.050 2.220 2.580 2.760
Head height (K) Min Max 0.166 0.208 0.250 0.292 0.333 0.365 0.407 0.480 0.563 0.636 0.710 0.790 0.880 0.960 1.110 1.270
0.176 0.218 0.260 0.302 0.343 0.375 0.417 0.500 0.583 0.666 0.750 0.830 0.920 1.000 1.170 1.330
Across corners e Max 0.51 0.61 0.69 0.82 0.95 1.06 1.17 1.39 1.50 1.71 1.93 2.15 2.37 2.56 2.98 3.19
Thread Length b Min Twice the Dia (2D)
Major Dia at thread BSW (min) 0.2427 0.3046 0.3666 0.4285 0.4904 0.5527 0.6147 0.7390 0.8653 0.9897 1.1140 1.2388 1.4879 1.7369 1.9862
Major Dia at thread BSW (max) 0.2488 0.3112 0.3736 0.4360 0.4985 0.5609 0.6233 0.7482 0.8750 1.000 1.1250 1.250 1.500 1.750 2.000
Major Dia at thread BSF (min) 0.2432 0.3051 0.3671 0.4290 0.4910 0.5533 0.6153 0.7394 0.8658 0.9902 1.1148 1.2395 1.3640 1.4888 1.7380 1.9876
Major Dia at thread BSF (max) 0.2489 0.3113 0.3737 0.4361 0.4985 0.5610 0.6234 0.7482 0.8750 1.000 1.1250 1.250 1.375 1.500

DIA 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 3/4 2
UNC Pitch (TPI) 20 18 16 14 13 12 11 10 9 8 7 7 6 6 5 4.5
UNF Pitch (TPI) 28 24 24 24 20 20 18 16 14 12 NOT RECOMMENDED
Head Across Flat (S) Min Max 0.430 0.493 0.554 0.617 0.742 0.804 0.929 1.115 1.300 1.488 1.657 1.830 2.017 2.205 2.565 2.940
0.437 0.500 0.562 0.625 0.750 0.812 0.937 1.125 1.312 1.500 1.687 1.875 2.062 2.250 2.625 3.000
Head Height (K) Min
Max		 0.153 0.201 0.233 0.281 0.313 0.361 0.393 0.463 0.543 0.597 0.678 0.773 0.838 0.934 1.074 1.203
0.163 0.211 0.243 0.291 0.323 0.371 0.403 0.483 0.563 0.627 0.718 0.813 0.878 0.974 1.134 1.263
Across corners e (MAX) 0.505 0.577 0.650 0.722 0.866 0.938 1.083 1.300 1.515 1.732 1.948 2.165 2.382 2.598 3.031 3.464
Thread Length b (Min) 2D + 1/4” upto bolt length of 6” and 2D + 1/2” for bolt lengths above 6”
Major Dia at thread ( Class 2A) Min for UNC 0.2408 0.3026 0.3643 0.4258 0.4876 0.5495 0.6113 0.7353 0.8592 0.9830 1.1064 1.2314 1.3544 1.4794 1.7268 1.9751
Major Dia at thread (2A) Min for UNF 0.2425 0.3042 0.3667 0.4281 0.4906 0.5524 0.6149 0.7391 0.8631 0.9868 NOT RECOMMENDED
Major Dia at thread Class 2A Max for UNC 0.2490 0.3113 0.3737 0.4361 0.4985 0.5609 0.6234 0.7482 0.8731 0.9980 1.1228 1.2478 1.3726 1.4976 1.7473 1.9971

Dimension of High Tensile Flat Washers

DIA M16 M20 M22 M24 M27 M30 M36
HARDNESS FOR PL. WASHER 35 TO 45 HRC
Hardness for Hot Dip Galvd washer 26 HRC
Outer Dia (Max) d2 34 42 44 50 56 60 72
Inner Dia (Min) d1 18 22 24 26 30 33 39
Thickness (S) 3.1 TO 4.6
Tolerance for OD Minus(-) 1.6 1.9
Tolerance for ID Plus(+) 0.43 0.52 0.62

High Strength Hex Nut Dimensions Schedule

High Strength Hex Nut Dimensions
DIA M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 M48 M52
Pitch 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3 3 3.5 3.5 4 4 4.5 4.5 5 5
Across Flat (S) Max Min 7 8 10 13 16 18 21 24 27 30 34 36 41 46 50 55 60 65 70 75 80
6.78 7.78 9.78 12.73 15.73 17.73 20.67 23.67 26.16 29.16 33 35 40 45 49 53.8 58.8 63.1 68.1 73.1 78.1
Thickness (M) Max Min 3.2 4.7 5.2 6.8 8.4 10.8 12.8 14.8 15.8 18 19.4 21.5 23.8 25.6 28.7 31 33.4 34 36 38 42
2.9 4.4 4.9 6.44 8.04 10.37 12.1 14.1 15.1 16.9 18.1 20.2 22.5 24.3 27.4 29.4 31.8 32.4 34.4 36.4 40.4
Across corners (E) Min 7.66 8.79 11.05 14.38 17.77 20.03 23.35 26.75 29.56 32.95 37.29 39.55 45.2 50.85 55.37 60.79 66.44 71.3 76.95 82.6 88.25
Minor Dia at thread (min) 3.242 4.134 4.917 6.647 8.376 10.106 11.835 13.835 15.294 17.294 19.294 20.752 23.752 26.211 29.211 31.67 34.67 37.129 40.129 42.587 46.587
Minor Dia at thread (max) 3.422 4.334 5.153 6.912 8.676 10.441 12.210 14.210 15.744 17.774 19.774 21.252 24.252 26.771 29.771 32.27 35.27 37.799 40.799 43.297 47.297

High Tensile Hex Screw Dimension Chart

High Tensile Hex Screw Dimensions
DIA M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 M48 M52
Pitch 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3 3 3.5 3.5 4 4 4.5 4.5 5 5
Grade A upto length 40 50 60 80 100 120 140 150 Grade A not applicable to these dia’s
Head Across Flat (S) Max Min(Grade A) Min (Grade B) 7 8 10 13 16 18 21 24 27 30 34 36 41 46 50 55 60 65 70 75 80
6.78 7.78 9.78 12.73 15.73 17.73 20.67 23.67 26.67 29.67 33.38 35.38 Grade A not applicable to these dia’s
6.64 7.64 9.64 12.57 15.57 17.57 20.16 23.16 26.16 29.16 33 35 40 45 49 53.8 58.8 63.1 68.1 73.1 78.1
Head Thickness (K) Tol + or – Grade A
Grade B		 2.8 3.5 4 5.3 6.4 7.5 8.8 10 11.5 12.5 14 15 17 18.7 21 22.5 25 26 28 30 33
0.125 0.15 0.18 0.215 Grade A not applicable to these dia’s
0.2 0.24 0.29 0.35 0.42 0.5
Across corners e Min Grade A
Min Grade B		 7.66 8.79 11.05 14.38 17.77 20.03 23.36 26.75 30.14 33.53 37.72 39.98 Grade A not applicable to these dia’s
7.5 8.63 10.89 14.2 17.59 19.85 22.78 26.17 29.56 32.95 37.29 39.55 45.2 50.85 55.37 60.79 66.44 71.3 76.95 82.6 88.25
Major Dia at thread (min) 3.838 4.826 5.794 7.76 9.732 11.701 13.682 15.682 17.623 19.623 21.623 23.577 26.577 29.522 32.522 35.465 38.465 41.437 44.437 47.399 51.399
Major Dia at thread (max) 3.978 4.976 5.974 7.972 9.968 11.966 13.962 15.962 17.958 19.958 21.958 23.952 26.952 29.947 32.947 35.94 38.94 41.937 44.937 47.929 51.929

High Tensile Stud Size In Mm Chart

Size Chart of High Tensile Bolts