DIN 931 HEX BOLTS

Parmar Steel offers a robust selection of DIN 931 Hex Bolts, renowned for their durability and strength in industrial applications. These bolts, crafted from premium-grade steel, adhere strictly to DIN standards, ensuring precision and reliability in every use. Ideal for structural assemblies and machinery, they feature a hexagonal head design that facilitates secure tightening with standard wrenches or spanners. Parmar Steel bolts are corrosion-resistant, making them suitable for both indoor and outdoor environments, safeguarding against rust and wear over extended periods. Whether for construction, automotive, or manufacturing needs, Parmar Steel DIN 931 Hex Bolts provide dependable fastening solutions, backed by quality craftsmanship and adherence to industry standards.

Standard ISO 4014
DIN Standard DIN931
Place of Origin India
ISO 4014 Bolts Surface treatment Passivation /plain
ISO 4014 Bolts Finishing Hop Dip Galvanized (HDG) phosphorization, Zinc Plated (Yellow, White, Blue, Black), Geomet, Black Oxide, anodization, Dacroment, Zinc-Nickel plated, Nickel plated, Tin Plated, Brass Plated, Copper Plated, Black Plated, Salt fog test, Gold Plated
Size M2 – M100
Diameter M3-M60
Length 6mm-500mm
Thread Types of Bolt Unified national fine (UNF),Unified national coarse (UNC), UNJC and UNJF threads, Unified national extra fine (UNEF), UNK threads, UNR threads, Constant-pitch threads.
ISO 4014 Bolts Head Square, Hex, Hex flange, Round, T-head , Flat & Triangular etc
ISO 4014 Bolts Neck type Square, Hex, Oval, Triangular & Knurled etc
ISO 4014 Bolts Drive type Slotted, Phil, Torx , Hex socket, & square slot etc
Application Nuclear power, Wind tower, Automotive industry, Railway, Electronic,  Construction industry,
ISO 4014 Bolts Dimensions ASME B18.6.3 *Exception: screws 6 inches and shorter are fully threaded.
Drive Style

Type I

Material stainless steel ss 304/ SS316 A2/A4, 18-8 Stainless Steel, SS303, SS201, SS316, SS304, SS904L, SS316L, A4-70; A2-70; A4-80
Thread Requirements UNC & UNF, ASME B1.1, Class 2A (Fastenal will inspect and accept parts with a 1A no-go gauge)
Finish Per ASTM A380/A380M
Production technology Cold Forged
Manufacturing Process Cold Heading, Wire Drawing, Heat Treatment, Insert tapping, Inspection, Packing, Surface Plating
Surface treatment
  • Electroplating (color, blue, white, black zinc, Ni, Cr, tin, copper, silver)
  • Hot-dip galvanizing
  • Rust preventive oil
  • Sand blasting
  • Passivation
  • Anodizing
  • Black oxide coating
  • Polish
  • Heat-disposing
Others OEM, ODM, ±0.03MM tolerance
Coatings Cadmium, Black Oxide, Teflon, Galvanized, Zinc, Xylan, Others Upon Request
Tolerance of stainless steel Hex Bolt +/-0.01mm to +/-0.05mm

ISO 4014 BOLT DIMENSIONS

Diameter (D) Body Diameter (D) Across the Flats (F) Across the Corners © Head Height (H) Thread Lengths (T)
MAX MIN MAX MIN MAX MIN MAX MIN < 6” > 6”
1/2 0.515 0.482 0.875 0.85 1.01 0.969 0.364 0.302 1.25 1.5
5/8 0.642 0.605 1.062 1.031 1.227 1.175 0.444 0.378 1.5 1.75
3/4 0.768 0.729 1.25 1.212 1.443 1.383 0.524 0.455 1.75 2
7/8 0.895 0.852 1.438 1.394 1.66 1.589 0.604 0.531 2 2.25
1 1.022 0.976 1.625 1.575 1.876 1.796 0.7 0.591 2.25 2.5
1 1/8 1.149 1.098 1.812 1.756 2.093 2.002 0.78 0.658 2.5 2.75
1 1/4 1.277 1.223 2 1.938 2.309 2.209 0.876 0.749 2.75 3
1 3/8 1.404 1.345 2.188 2.119 2.526 2.416 0.94 0.81 3 3.25
1 1/2 1.531 1.47 2.375 2.3 2.742 2.622 1.036 0.902 3.25 3.5
1 3/4 1.785 1.716 2.75 2.662 3.175 3.035 1.196 1.054 3.75 4
2 2.039 1.964 3.125 3.025 3.608 3.449 1.388 1.175 4.25 4.5
2 1/4 2.305 2.214 3.5 3.388 4.041 3.862 1.548 1.327 4.75 5
2 1/2 2.559 2.461 3.875 3.75 4.474 4.275 1.708 1.479 5.25 5.5
2 3/4 2.827 2.711 4.25 4.112 4.907 4.688 1.869 1.632 5.75 6
3 3.081 2.961 4.625 4.475 5.34 5.102 2.06 1.815 6.25 6.

DIMENSION OF ISO 4014 GRADE 8.8 BOLTS

NOMINAL SIZE (D)
BODY DIAMETER
HEAD THICKNEASTM A193
ACROASTM A193 THE FLATS
ACROASTM A193 CORNERS
D (MAX)
D (MIN)
H (MAX)
H (MIN)
F (MAX)
F (MIN)
C (MAX)
C (MIN)
m10
10.00
9.78
6.63
6.17
17.00
15.73
18.48
17.77
m12
12.00
11.73
7.76
4.24
19.00
17.73
20.78
20.03
m14
14.00
13.73
9.09
8.51
22.00
20.67
24.25
23.35
m16
16.00
15.73
10.32
9.68
24.00
23.67
27.71
26.75
m20
20.00
19.67
12.88
12.12
30.00
29.16
34.64
32.95
m24
24.00
23.67
15.44
14.56
36.00
35.00
41.57
39.55
m30
30.00
29.67
19.48
17.92
46.00
45.00
53.12
50.85
m36
36.00
35.61
23.38
21.63
55.00
53.80
63.51
60.79
m42
42.00
41.38
26.97
25.03
65.00
62.90
75.06
71.71
m48
48.00
47.38
31.07
28.93
75.00
72.60
86.60
82.76
m56
56.00
55.26
36.2
33.80
85.00
82.20
98.15
93.71
m64
64.00
63.26
41.32
38.68
95.00
91.80
109.70
104.65
m72
72.00
71.26
46.45
43.55
105.00
101.40
121.24
115.60
m80
80.00
79.26
51.58
48.42
115.00
111.00
132.72
126.54
m90
90.00
89.13
57.74
54.26
130.00
125.50
150.11
143.07
m100
90.00
99.13
63.9
60.10
145.00
140.00
167.43
159.60

EN 4014 HEX HEAD BOLTS SIZE CHART

Nominal Dia Thr Pitch Thread Dia Body Dia Flat Width Head Height Length Thread Length
M1.6X.35 1.6000 1.6000 3.2000 1.2250 12, 16 9
M2X.4 2.0000 2.0000 4.0000 1.5250 16, 20 10
M2.5X.45 2.5000 2.5000 5.0000 1.8250 16, 20, 25 11
M3X.5 3.0000 3.0000 5.5000 2.1250 20 to 30 by 5 12
M4X.7 4.0000 4.0000 7.0000 2.9250 25 to 40 by 5 14
M5X0.8 5.0000 5.0000 8.0000 3.6500 25 to 50 by 5 16
M6X1 6.0000 6.0000 10.0000 4.1500 30 to 50 by 5, 60 18
M8X1.25 8.0000 8.0000 13.0000 5.4500 40 to 70 by 5, 80 22
M10X1.5 10.0000 10.0000 16.0000 6.5800 45 to 70  by  5, 80, 90, 100 26
M12X1.75 12.0000 12.0000 18.0000 7.6800 50 to 70 by 5, 80 to 120 by 10 30
M16X2 16.0000 16.0000 24.0000 10.1800 65, 70 to 160 by 10 38, 44
M20X2.5 20.0000 20.0000 30.0000 12.7150 80 to 160 by 10, 180, 200 46, 52
M24X3 24.0000 24.0000 36.0000 15.2150 90 to 160 by  10, 180 to 240 by 20 54, 60, 73
M30X3.5 30.0000 30.0000 46.0000 19.1200 110 to 160  by 10, 180 to 300 by 20 66, 72, 85
M36X4 36.0000 36.0000 55.0000 22.9200 140, 150, 160, 200 to 360 by 20 84, 97
M42X4.5 42.0000 42.0000 65.0000 26.4200 160 to 440 by 20 96, 109
M48X5 48.0000 48.0000 75.0000 30.4200 180 to 480 by 20 108, 121
M56X5.5 56.0000 56.0000 85.0000 35.5000 220 to 500 by 20 137
M64X6 64.0000 64.0000 95.0000 40.5000 260 to 500 by 20 153

WEIGHT OF ISO 4014 HEX HEAD BOLTS

L WEIGHT IN KG/1000 PCS
30 8.06
35 9.13 18.20
40 10.20 20.30 35.00
45 11.30 22.20 38.00 53.60
50 12.30 24.20 41.10 58.10 82.00
55 13.40 25.80 43.80 62.60 88.10 115.00
60 14.40 27.80 46.90 67.00 94.10 123.00
65 29.80 50.00 70.30 98.80 131.00 171.00 219.00
70 31.80 53.10 74.70 105.00 139.00 181.00 231.00
75 33.70 56.20 79.10 111.00 147.00 191.00 243.00
80 35.70 59.30 83.60 117.00 155.00 200.00 255.00
85 62.40 88.10 123.00 163.00 210.00 267.00
90 65.50 92.40 127.00 171.00 220.00 279.00
95 68.60 96.80 133.00 179.00 230.00 291.00
100 71.70 101.00 139.00 186.00 240.00 303.00
110 109.00 151.00 202.00 260.00 327.00
120 118.00 164.00 218.00 280.00 351.00
130 174.00 230.00 296.00 374.00
140 185.00 246.00 316.00 398.00
150 262.00 336.00 422.00
160 278.00 356.00 446.00
170 376.00 470.00
180 396.00 494.00
190 519.00
200 544.00

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The company has over two decade long record of servicing customers in India as well as all over the world. The company attaches significant emphasis on ensuring adherence to quality standards at all levels.

The basic thrust of the quality philosophy is summed up in the company's Quality Policy which serves as the bench mark of all functions executed by the company. Strict quality assurance system is being followed in all our departments and Total Quality Management is applied to streamline and all the procedures and practices in operation to achieve high standard of efficiency.

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48/50, Hingwala Building, Office No. 8, 3rd Floor, C. P. Tank Road, Mumbai - 400004, Maharashtra, India
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