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Grade 12.9 Bolt

Manufacturer of Grade 12.9 Threaded Rod in India, with Good Strength


Grade 12.9 Bolt


Grade 12.9 Bolt can come in quenched and tempered condition. The material is a high tensile material and there are different types of bolts in this grade of material. The hex socket head cap bolt, hex screws, socket cap screws and others are used in specific application circumstances. The Grade 12.9 Hex Bolts are used in high strength applications for the ease of installation with tools..

The applications that require high torque forces to drive the bolts use the Grade 12.9 Hex Head Bolts. The grade is DIN 933 and there are ASTM F568 and ASME SF568 standards that govern the dimensions of these bolts. The diameter of the bolts can range from 1.6mm to 100mm or from ¾ inches to 3 ½ inches. The High Tensile 12.9 Metric Hex Bolts are measured in metric scale. There are different coating types available for the fasteners as well. The plain, zinc plated and hot dip galvanized finishes are the most commonly used types. The 12.9 Grade Threaded Rod is a special type that has no head but a rod with thread.

This type of fastener is useful in narrow spaces and in connecting components both ways. The thread types vary as coarse and fine threads as well. The High Tensile Grade 12.9 Fasteners have up to 1200MPa minimum tensile strength, 1100MPa minimum yield strength and up to 970MPa minimum proof load strength. The applications include machineries, tools, equipment and parts in petroleum, oil and gas, construction and in general engineering and structural applications.


Table of Content


fasteners types


Grade 12.9 Bolt

Grade 12.9 Bolt

High tensile Grade 12.9 Hex Bolts

High tensile Grade 12.9 Hex Bolts

12.9 Grade Threaded Rod

12.9 Grade Threaded Rod


Exporter of High tensile 12.9 hex Bolts & ASTM F568 Grade 12.9 Socket Head Cap Screw Tested with PMT test, Ultrasonic test, Micro test etc, Check Specification


Specifications of 12.9 Bolt


Size

12.9 Bolt Sizes

  • Metric Size: M5 to M100
  • Imperial Sizes: M6 to M30
  • Length: 20 mm - 200 mm
Benefits

Benefits

  • High Strength and Durability
  • Corrosion Resistance (with Coating)
  • Improved Safety
Certification

Certification

  • CE Marking
  • Traceability Certification
  • Raw Materials Certificate

threads

Threads Types

  • UNF
  • BSF, UNC
  • BSW
  • METRIC
Head Types

Head Types

  • Hex flange
  • Hex, Square
  • Round,Flat
  • T-head & Triangular
finish

Finishing

  • Zinc , black oxide, BZP
  • Geometry, Dacroment, Hot Dip Galvanised (HDG),
  • Anodizing, plated zinc-nickel, nickel plated

Applications

Applications

  • Automotive Industry
  • Heavy Machinery & Equipment
  • Electrical and Electronics
  • Marine Industry
Packaging

Packaging Methods

  • Bulk Packaging (Loose)
  • Individual Packaging
  • Tray Packaging
  • Palletized Packaging
Testing Methods

Testing Methods

  • Corrosion Testing
  • Tensile Testing
  • Impact Testing
  • Hardness Testing

Cutting Methods

Cutting Methods

  • Angle Grinder
  • Threaded Rod Cutter
  • Hacksaw
Disadvantages

Disadvantages

  • Higher Cost
  • Reduced Ductility
  • Increased Weight
Documentation

Documentation

  • Guarantee Letter
  • Fumigation Certificates
  • Raw Material Test Reports

Neck type

Neck type

  • Hex, Square
  • Oval
  • Triangular
  • Knurled
Production process

Production process

  • Cold Forging
  • Hot Forging
  • Machining and CNC
  • Customized
coating

Surface Coating

  • Black Oxide
  • Teflon, Xylan, Zinc
  • Cadmium, Galvanized
  • Others Upon Request


Types of 12.9 Bolt


Grade 12.9 Hex Head Bolt

Grade 12.9 Hex Head Bolt

12.9 Grade Suppliers J-Bolts

12.9 Grade Suppliers J-Bolts

12.9 Bolt U-Bolts

12.9 Bolt U-Bolts

12.9 hex Square Head Bolts

12.9 hex Square Head Bolts

Metric 12.9 Heavy Hex Bolt

Metric 12.9 Heavy Hex Bolt

12.9 Allen Shoulder Bolts

12.9 Allen Shoulder Bolts

12.9 Hex Head Eye Bolts

12.9 Hex Head Eye Bolts

12.9 Flange Bolts

12.9 Flange Bolts

Stockist Class 12.9 Hex Nut & Grade 12.9 m7 Bolts Available in Multiple Dimensions, Refer Size Chart


Dimensions Chart Of 12.9 Grade Threaded Rod


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
Gr A upto length 40 50 60 80 100 120 140 150 Gr A not applicable to these dia’s
Head Across Flat (S) 7 8 10 13 16 18 21 24 27 30 34 36 41 46 50 55 60 65 70 75 80
Nom = Max
Min
Gr A 6.78 7.78 9.78 12.73 15.73 17.73 20.67 23.67 26.67 29.67 33.38 35.38 Gr A not applicable to these dia’s
Gr B 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 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
Tol + or –
Gr A 0.125 0.15 0.18 0.215 Gr A not applicable to these dia’s
Gr B 0.2 0.24 0.29 0.35 0.42 0.5
Across cornerse Min 7.66 8.79 11.05 14.38 17.77 20.03 23.36 26.75 30.14 33.53 37.72 39.98 Gr A not applicable to these dia’s
Gr A
Gr B 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) 14 16 18 22 26 30 34 38 42 46 50 54 60 66 Not specified as full thread recommended
For lengths
< or = 125mm
For lengths
For lengths > 200mm 33 35 37 41 45 49 53 57 61 65 69 73 79 85 91 97 103 109 115 121 129
> 125mm<= 200mm 20 22 24 28 32 36 40 44 48 52 56 60 66 72 78 84 90 96 102 108 116
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
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

Dimensions of Grade 12.9 Threaded Bar


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
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
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
BSF PITCH (TPI) 26 22 20 18 16 16 14 12 11 10 9 9 8 8 7 7
BSW Pitch (TPI) 20 18 16 14 12 12 11 10 9 8 7 7 6 5 4.5
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
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 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 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
Thread Length b Min Twice the Dia (2D)
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

Standards Dimensions of High Tensile 12.9 Washer


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

Dimensions of HT Grade 12.9 Screw


DIA M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 M48

M52

Gr A upto length 40 50 60 80 100 120 140 150 Gr A not applicable to these dia’s
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

Head Thickness (K) Tol + or – Gr A

Gr 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 Gr A not applicable to these dia’s
0.2 0.24 0.29 0.35 0.42

0.5

Head Across Flat (S) Max Min(Gr A) Min (Gr 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 Gr 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

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

Across corners e Min Gr A
Min Gr 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 Gr 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


ASTM A324 HT Grade 12.9 Price In India


Grade 12.9 Bolt Supplier in India offers high-quality, corrosion-resistant fasteners at competitive prices.


Type Of Fasteners Price In India (INR) Per Unit Grade Size Length
Hex Bolts 385.00 High Tensile Grade 12.9 M16 12″
Hex Bolts 278.00 High Tensile Grade 12.9 M12 6″
Hex Bolts 300.00 High Tensile Grade 12.9 M20 10″
Hex Bolts 400.00 High Tensile Grade 12.9 M14 14″

View Grade 12.9 Hex Head Bolts & 12.9 Grade Allen Bolt With Accurate Torque Values, Refer Torque Chart

Torque Chart Of Grade 12.9 Bolt


Grade 12.9 Bolt Manufacturer in India offers a Excellent torque chart for fasteners


Maximum Recommended Tightening Torques
Metric Course Pitch Grade 12.9 Plated Metric Course Pitch Grade 10.9 Plated Metric Course Pitch Grade 8.8 Plated
Nm ft-lb Nm ft-lb Nm ft-lb
M42 5525 4075 M42 4604 3396 M42 3274 2415
M6 14 10 M6 12 9 M6 8 6
M10 68 50 M10 57 42 M10 40 30
(M33) 2690 1984 (M33) 2242 1653 (M33) 1594 1176
(M45) 6871 5068 (M45) 5726 4223 (M45) 4072 3003
M48 8287 6113 M48 6906 5094 M48 4911 3622
M52 10749 7928 M52 8958 6607 M52 6370 4698
M16 295 218 M16 246 181 M16 175 129
(M18) 406 299 (M18) 338 249 (M18) 241 177
M20 576 424 M20 480 354 M20 341 252
(M22) 783 577 (M22) 652 481 (M22) 464 342
M12 119 88 M12 99 73 M12 70 52
(M14) 189 139 (M14) 158 116 (M14) 112 83
M24 995 734 M24 829 612 M24 590 435
(M27) 1456 1074 (M27) 1213 895 (M27) 863 636
M30 1977 1458 M30 1647 1215 M30 1171 864
M8 34 25 M8 29 21 M8 20 15
M36 3454 2548 M36 2879 2123 M36 2047 1510
(M39) 4471 3298 (M39) 3726 2748 (M39) 2649 1954

Grade 12.9 High Tensile Nuts Size Chart


Size Of Nut
(mm)		 Diameter Of
(mm)		 Height Table
(mm)
Hex Nut Jam Nut Nylock Nut
3 5.5 2.4 1.8 4
16 24 13 8 16
18 27 15 9 18.5
4 7 3.2 2.2 5
12 19 10 6 12
5 8 4 2.7 5
8 13 6.5 4 8
10 17 8 5 10
6 10 5 3.2 6
7 11 5.5 3.5 -
14 22 11 7 14
2 4 1.6 1.2 -
2.5 5 2 1.6 -
20 30 16 10 20

Weight Chart Of HT Grade 12.9 Hex Nut


Sizes Weight per Meter Weight per Metre Size UNC
M6 0.194 0.177 ¼
M8 0.323 0.319 5/16
M12 0.896 0.725 ½
M24 3.638 3.000 1
M36 8.281 6.900 1 ½
M2 0.0187
M2.5 0.030
M39 9.726 8.200 1 5/8
M3 0.044
M3.5 0.060
M27 4.545 3.850 1 1/8
M42 11.231 9.400 1 ¾
M45 13.038 11.000 1 7/8
M48 14.741 12.400 2
M14 1.096 0.970 9/16
M16 1.342 1.330 5/8
M30 5.718 4.750 1 ¼
M33 6.842 5.900 1 3/8
M4 0.078
M5 0.124
M18 1.650
M10 0.469 0.500 3/8
0.650 7/16
M20 2.021 2.080 ¾
M22 2.756 2.540 7/8

Equivalent material of 12.9 Alloy Steel Hex Bolt


United Kingdom

BS

080M40

north america

UNS

UNS G41400

Russia

AFNOR

Z7CN18‐09

Europe

EN

EN 10132

Japan

SUS

SCM440

Russia

WERKSTOFF NR.

1.7225 (40CrMo4)



Get HT Class 12.9 Metric Bolts & DIN 933 Grade 12.9 Bolts With High Tensile Strength, Check Mechanical Properties

Chemical Composition of Allen Bolt 12.9 Grade Washer


0.90% – 1.20%

Carbon
0.60% – 1.65%

Mn
0.80% – 1.10%

Cr
0.30% max

Ni
0.035% max

S
98-99%

Fe
0.20% – 0.35%

Si

12.9 Bolts Physical Properties


Property Value
Thermal Expansion 12 x 10⁻⁶ /°C
Poisson's Ratio 0.29
Yield Strength ≥ 1,100 MPa
Elongation ≥ 8-10%
Hardness (Rockwell) 35–42 HRC
Melting Point 1,400–1,510°C
Tensile Strength ≥ 1,220 MPa
Density 7.85 g/cm³
Modulus of Elasticity 210 GPa

Mechanical Properties Of 12.9 High Tensile Bolts


Description of Image 2

Modulus Elasticity

210 GPa or (30,000,000 psi)

Description of Image 1

Elongation

≥ 8-10%

Description of Image 1

Tensile Strength

≥ 1,220 MPa (177,000 psi)

Description of Image 2

Yield Strength

≥ 1,100 MPa (160,000 psi)


Which is Stronger 12.9 or 10.9 Steel Bolt?


Property 12.9 Steel Bolt 10.9 Steel Bolt
Tensile Strength 1200 MPa (min) 900 MPa (min)
Yield Strength 1100 MPa (min) 800 MPa (min)
Hardness Higher (HRC 39-44) Moderate (HRC 32-39)
Strength Category Higher (Stronger) Lower (Weaker)

What Are Grade 12.9 High Tensile Bolts?


  • ➤ Grade: 12.9 high tensile bolts
  • ➤ Tensile Strength: Minimum 1200 MPa
  • ➤ Yield Strength: Minimum 1100 MPa
  • ➤ Hardness: HRC 39-44
  • ➤ Material: Alloy steel, often heat-treated
  • ➤ Application: Used in high-stress industries
  • ➤ Strength: Very high strength, stronger than Grade 10.9 bolts

Are Grade 12.9 Bolts Heat-treated?


Yes, Grade 12.9 bolts are typically heat-treated to enhance their strength and hardness.


What is the Relationship Between the Diameter and Tensile Strength of Grade 12.9 Bolts?


Factor Description
Bolt Grade Grade 12.9 (high-strength alloy steel)
Tensile Strength 1200 MPa (maximum stress before failure)
Diameter Influence Increasing diameter increases tensile strength
Formula F tensile​ = σ tensile​ × A
Area Calculation A = π × ( 2 d​ ) 2
Relationship Tensile strength increases proportional to the square of the diameter
Impact Doubling diameter increases tensile strength by four times

Materials