Alloy 20 Fasteners

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Alloy 20 Fasteners
What affects Alloy 20 fasteners tension?

Factors affecting the tension of the fastener would include:

  • The direct torque application on 20cb3 screws
  • The lubrication and the mating surfaces by reducing friction during tightening Inconel alloy 20 stud.
  • The condition of the threads like cleanliness and any damage. Smooth, undamaged Werkstoff 2.4660 dowel pins threads enable consistent torque application.
  • The type of coating on the surface of alloy 20 fasteners can affect the friction between them and the mating surface.
  • The condition of the NiCr20CuMo rivets mating surfaces. Rough or uneven surfaces may affect the even distribution of tension which might require additional care.
  • The length of the UNS N08020 washers can influence the amount of tension achieved. Longer ones have a greater potential to stretch and generate higher tension.
Table of content

We take great pleasure in introducing ourselves as the oldest manufacturer of carpenter 20 bolts and nuts in India.

What are the defects of carpenter 20 hex bolts? how you prevent it ?

Common defects encountered by Carpenter 20 hex bolts are:

  • Threads on the bolt can become damaged due to improper handling or threading techniques and if excessive force is applied during installation.
  • The material can experience corrosion if exposed to highly corrosive environments or incompatible materials.
  • They may experience reduced strength and potential failure under load if hex bolts are not given proper heat treatment.
  • Surface flaws can occur during the manufacturing process or handling.

The preventive measures would include:

  • Handle the bolts with proper care
  • Follow recommended installation practices and use suitable tools & lubricants.
  • Assess the environmental conditions and select hex bolts specific to those services.
  • Purchase the hex bolts from reputable manufacturers like Regent Steel & Engineering Co.  They adhere to industry standards and provide quality assurance documentation.
  • Inspect the bolts at regular intervals for any signs of damage, corrosion, or surface flaws.

We are Mumbai's most reliable supplier for UNS N08020 hex bolts and studs at cheap costs that meet customer specifications

Carpenter 20 hex bolts

Carpenter 20 hex bolts

Inconel alloy 20 stud

Inconel alloy 20 stud

DIN 2.4660 threaded rod

DIN 2.4660 threaded rod

What is the purpose of DIN 2.4660 threaded rod?

The DIN 2.4660 threaded rod is a versatile fastening solution used in applications where high corrosion resistance and strength are required. They provide a reliable connection in applications where standard bolts or screws may not be suitable due to corrosive environments. The threaded rods are used in industries like chemical, petrochemical, marine & shipbuilding, water treatment, construction & infrastructure. The material has high strength, corrosion resistance and versatility which makes it ideal for demanding applications.

We carry a ready supply of DIN 2.4660 threaded rod and screws in sizes ranging from standard #00 to 4" in diameter and with UNF, UNJ, UNC, UNR etc. thread

Alloy 20 fasteners specification
Sizes Thread Type
Size: M2 to M160
Length: 3 to 200 mm
BSW, METRIC, UNC, BSF, UNF Bolts, Nut, Studs, Threaded rod
Specification Coating Certification
Cold and Hot Froging, CNC Teflon, Hot Dipped Galvanizing, Xylon , Zinc EN 10204 / 3.1
We are a stockist of 20cb3 socket head cap screws and washers, and we can supply them in bespoke sizes at the most affordable prices. Learn more about the numerous varieties that are available.
Different types carpenter 20 fasteners
Alloy 20 bolts

Alloy 20 bolts

  • Size: M2 to M160
  • Length: 3 to 200 mm
  • Six-Lobe, Phillips, Slotted,
UNS N08020 washers

UNS N08020 washers

  • Electrical Resistivity: 651 Ohm-circ mil/ft
  • Density: 0.278 lb/in3 annealed
  • Melting Point: 2525-2630°F
20cb3 screws

20cb3 screws

  • NPT, UNF
  • UNS, NPTF
  • UNEF, UNC
Trying to get Inconel alloy 20 heavy hex bolts and u bolts in a rare size? Don't worry; you can now purchase items at dealer prices online. and look at NiCr20CuMo properties
Alloy 20 bolts equivalent
STANDARD AFNOR UNS EN WERKSTOFF NR.
Alloy 20 Z2NCUD31-20AZ N08020 NiCr20CuMo 2.4660
20cb3 nuts mechanical properties
Tensile Strength min Yield Strength (0.2% offset) min Elongation in 2"
or 4D
Reduction in Area
KSI min MPa min KSI min MPa min % min %
80 551 35 241 30 50
DIN 2.4660 threaded rod chemical properties
  Cu Ni Fe Cr Mo C Cb/Nb + Ta Mn S Si P -
Min 3.00 32.00 Bal 19.00 2.00 - 8 x C% - - - - %
Max 4.00 38.00 21.00 3.00 0.07 1.00 2.00 0.035 1.00 0.045 %
Thermal properties of 20cb3 screws
Properties Imperial Metric
Thermal conductivity 85.4 BTU.in/hrft².°F 12.3 W/mK
Thermal expansion co-efficient (@20-100°C/68-212°F) 8.17 µin/in°F 14.7 µm/m°C
Carpenter 20 bolts dimensions
Nominal Size
or Basic
Product
Diameter

Width Across Flats,
F
Full-Size Body
Diameter,
E
Width Across
Corners, G
Radius of
Fillet, R
Head Height, H Basic Nominal Thread
Length for Bolt
Lengths,
LT
inch mm Max Basic
inch
Min Min Max Min Max Min Max Max Basic
inch
Min Over
6 in.
6 in. and
Shoter
5⁄16 0.3125 0.5 1⁄2 0.484 0.298 0.324 0.552 0.577 0.01 0.03 0.235 7⁄32 0.195 1.125 0.875
1⁄4 0.25 0.438 7⁄16 0.425 0.237 0.26 0.484 0.505 0.01 0.03 0.188 11⁄64 0.15 1 0.75
3⁄8 0.375 0.562 9⁄16 0.544 0.36 0.388 0.62 0.65 0.01 0.03 0.268 1⁄4 0.226 1.25 1
1⁄2 0.5 0.75 3⁄4 0.725 0.482 0.515 0.826 0.866 0.01 0.03 0.364 11⁄32 0.302 1.5 1.25
7⁄16 0.4375 0.625 5⁄8 0.603 0.421 0.452 0.687 0.722 0.01 0.03 0.316 19⁄64 0.272 1.375 1.125
5⁄8 0.625 0.938 15⁄16 0.906 0.605 0.642 1.033 1.083 0.02 0.06 0.444 27⁄64 0.378 1.75 1.5
7⁄8 0.875 1.312 1 5⁄16 1.269 0.852 0.895 1.447 1.516 0.02 0.06 0.604 37⁄64 0.531 2.25 2
3⁄4 0.75 1.125 11⁄8 1.088 0.729 0.768 1.24 1.299 0.02 0.06 0.524 1⁄2 0.455 2 1.75
1 1 1.5 1 1⁄2 1.45 0.976 1.022 1.653 1.732 0.03 0.09 0.7 43⁄64 0.591 2.5 2.25
1 1⁄4 1.25 1.875 1 7⁄8 1.812 1.223 1.277 2.066 2.165 0.03 0.09 0.876 27⁄32 0.749 3 2.75
1 1⁄8 1.125 1.688 1 11⁄16 1.631 1.098 1.149 1.859 1.949 0.03 0.09 0.78 3⁄4 0.658 2.75 2.5
1 3⁄8 1.375 2.062 2 1⁄16 1.994 1.345 1.404 2.273 2.382 0.03 0.09 0.94 29⁄32 0.81 3.25 3
1 5⁄8 1.625 2.438 2 7⁄16 2.356 1.591 1.658 2.616 2.815 0.03 0.09 1.116 1 3⁄32 0.978 3.75 3.5
3 3⁄4 3.75 5.625 5 5⁄8 5.437 3.726 3.858 6.198 6.495 0.06 0.19 2.572 2 1⁄2 2.241 8 7.75
1 1⁄2 1.5 2.25 2 1⁄4 2.175 1.47 1.531 2.48 2.598 0.03 0.09 1.036 1 0.902 3.5 3.25
1 3⁄4 1.75 2.625 2 5⁄8 2.538 1.716 1.785 2.893 3.031 0.04 0.12 1.196 1 5⁄32 1.054 4 3.75
2 2 3 3 2.9 1.964 2.039 3.306 3.464 0.04 0.12 1.388 1 11⁄32 1.175 4.5 4.25
1 7⁄8 1.875 2.812 2 13⁄16 2.719 1.839 1.912 3.099 3.248 0.04 0.12 1.276 1 1⁄4 1.13 4.25 4
2 1⁄4 2.25 3.375 3 3⁄8 3.262 2.214 2.305 3.719 3.897 0.06 0.19 1.548 1 1⁄2 1.327 5 4.75
2 3⁄4 2.75 4.125 4 1⁄8 3.988 2.711 2.827 4.546 4.763 0.06 0.19 1.869 1 13⁄16 1.632 6 5.75
4 4 6 6 5.8 3.975 4.111 6.612 6.928 0.06 0.19 2.764 2 11⁄16 2.424 8.5 8.25
2 1⁄2 2.5 3.75 3 3⁄4 3.625 2.461 2.559 4.133 4.33 0.06 0.19 1.708 1 21⁄32 1.479 5.5 5.25
3 3 4.5 4 1⁄2 4.35 2.961 3.081 4.959 5.196 0.06 0.19 2.06 2 1.815 6.5 6.25
3 1⁄2 3.5 5.25 5 1⁄4 5.075 3.461 3.589 5.786 6.062 0.06 0.19 2.38 2 5⁄16 2.057 7.5 7.25
3 1⁄4 3.25 4.875 4 7⁄8 4.712 3.21 3.335 5.372 5.629 0.06 0.19 2.251 2 3⁄16 1.936 7 6.75
DIN 2.4660 nuts dimensions
Nominal
Size





inch
Basic Major
Diameter of
Thread
Width Across
Corners,
G
Width Across Flats,
F
Thickness Heavy
Hex Jam Nuts,
H1
Thickness Heavy
Hex Nuts,
H
Maximum Runout of
Bearing Surface to
Thread
Axis, FIM
Heavy HEX NUTS Heavy Hex
Jam Nuts
Specified Proof load
Max Min. Min. Basic
inch
Max Min. Basic
inch
Max Min. Basic
inch
Max 150,000 psi
and Greater
Up to
150,000 psi
All Strength
Levels
5/16 0.3125 0.650 0.622 0.546 9/16 0.562 0.186 13/64 0.220 0.280 19/64 0.314 0.012 0.020 0.020
1/4 0.2500 0.577 0.556 0.488 1/2 0.500 0.156 11/64 0.188 0.218 15/64 0.250 0.011 0.017 0.017
3/8 0.3750 0.794 0.763 0.669 11/16 0.688 0.216 15/64 0.252 0.341 23/64 0.377 0.014 0.021 0.021
1/2 0.5000 1.010 0.969 0.850 7/8 0.875 0.277 19/64 0.317 0.464 31/64 0.504 0.016 0.023 0.023
7/16 0.4375 0.866 0.830 0.728 3/4 0.750 0.247 17/64 0.285 0.403 27/64 0.441 0.015 0.022 0.022
9/16 0.5625 1.083 1.037 0.909 15/16 0.938 0.307 21/64 0.349 0.526 35/64 0.568 0.017 0.024 0.024
3/4 0.7500 1.443 1.382 1.212 1 1/4 1.250 0.398 27/64 0.446 0.710 47/64 0.758 0.020 0.027 0.027
5/8 0.6250 1.227 1.175 1.031 1 1/16 1.062 0.337 23/64 0.381 0.587 39/64 0.631 0.018 0.025 0.025
7/8 0.8750 1.660 1.589 1.394 1 7/16 1.438 0.458 31/64 0.510 0.833 55/64 0.885 0.022 0.029 0.029
1 1/8 1.1250 2.093 2.002 1.756 1 13/16 1.812 0.579 39/64 0.639 1.079 1 7/64 1.139 0.027 0.033 0.033
1 1.0000 1.876 1.796 1.575 1 5/8 1.625 0.519 35/64 0.575 0.956 63/64 1.012 0.024 0.031 0.031
1 1/4 1.2500 2.309 2.209 1.938 2 2.000 0.687 23/32 0.751 1.187 1 7/32 1.251 0.030 0.035 0.035
1 1/2 1.5000 2.742 2.622 2.300 2 3/8 2.375 0.808 27/32 0.880 1.433 1 15/32 1.505 0.036 0.041 0.041
1 3/8 1.3750 2.526 2.416 2.119 2 3/16 2.188 0.747 25/32 0.815 1.310 1 11/32 1.378 0.033 0.038 0.038
1 5/8 1.6250 2.959 2.828 2.481 2 9/16 2.562 0.868 29/32 0.944 1.556 1 19/32 1.632 0.038 0.044 0.044
4 4.0000 7.073 6.755 5.925 6 1/8 6.125 2.112 2 3/16 2.264 3.862 3 15/16 4.014 0.093 0.107 0.107
1 7/8 1.8750 3.392 3.242 2.844 2 15/16 2.938 0.989 1 1/32 1.073 1.802 1 27/32 1.886 0.044 0.051 0.051
1 3/4 1.7500 3.175 3.035 2.662 2 3/4 2.750 0.929 31/32 1.009 1.679 1 23/32 1.759 0.041 0.048 0.048
2 2.0000 3.608 3.449 3.025 3 1/8 3.125 1.050 1 3/32 1.138 1.925 1 31/32 2.013 0.047 0.055 0.055
2 1/2 2.5000 4.474 4.275 3.750 3 7/8 3.875 1.401 1 29/64 1.505 2.401 2 29/64 2.505 0.058 0.068 0.068
3 1/2 3.5000 6.207 5.928 5.200 5 3/8 5.375 1.870 1 15/16 2.006 3.370 3 7/16 3.506 0.081 0.094 0.094
2 1/4 2.2500 4.041 3.862 3.388 3 1/2 3.500 1.155 1 13/64 1.251 2.155 2 13/64 2.251 0.052 0.061 0.061
3 3.0000 5.340 5.102 4.475 4 5/8 4.625 1.643 1 45/64 1.763 2.893 2 61/64 3.013 0.070 0.081 0.081
2 3/4 2.7500 4.907 4.688 4.112 4 1/4 4.250 1.522 1 37/64 1.634 2.647 2 45/64 2.759 0.064 0.074 0.074
3 1/4 3.2500 5.774 5.515 4.838 5 5.000 1.748 1 13/16 1.876 3.124 3 3/16 3.252 0.075 0.087 0.087
3 3/4 3.7500 6.640 6.341 5.562 5 3/4 5.750 1.990 2 1/16 2.134 3.616 3 11/16 3.760 0.087 0.100 0.100
Inconel alloy 20 stud dimensions
Nominal Size
Diameter, D
inch
Umax = 2P Tap End Full
Thread Length,
BM
Minimum Nut End
Full Thread Length,
Bmin
UNF Thread UNC & NC-5
Thread
8UN Thread Min. Nominal Max. 10 < L ≤ 16 L ≤ 10 L > 16
5/16 0.083 0.111 -- 0.440 0.469 0.498 1.125 0.875 1.625
1/4 0.071 0.100 ... 0.350 0.375 0.400 1.000 0.750 1.500
3/8 0.083 0.125 -- 0.532 0.563 0.594 1.250 1.000 1.750
1/2 0.100 0.154 -- 0.708 0.750 0.792 1.500 1.250 2.000
7/16 0.100 0.143 -- 0.620 0.656 0.692 1.375 1.125 1.875
9/16 0.111 0.167 -- 0.802 0.844 0.896 1.625 1.375 2.125
3/4 0.125 0.200 -- 1.075 1.1.25 1.175 2.000 1.750 2.500
5/8 0.111 0.182 -- 0.892 0.938 0.983 1.750 1.500 2.250
7/8 0.143 0.222 -- 1.258 1.313 1.368 2.250 2.000 2.750
1 1/8 0.167 0.286 0.250 1.625 1.688 1.750 2.750 2.500 3.250
1 0.167 0.250 -- 1.438 1.500 1.562 2.500 2.250 3.000
1 1/4 0.167 0.286 0.250 1.813 1.875 1.938 3.000 2.750 3.500
3 3/4 -- 0.500 0.250 5.525 5.625 5.725 8.000 -- 8.500
1 1/2 0.167 0.333 0.250 2.188 2.250 2.313 3.500 3.250 4.000
1 3/8 0.167 0.333 0.250 2.000 2.063 2.125 3.250 3.000 3.750
1 5/8 -- -- 0.250 2.375 2.438 2.500 3.750 3.500 4.250
1 7/8 -- -- 0.250 2.750 2.813 2.875 4.250 4.000 4.750
1 3/4 -- 0.400 0.250 2.563 2.625 2.688 4.000 3.750 4.500
2 -- 0.444 0.250 2.925 3.000 3.075 4.500 4.250 5.000
2 1/2 -- 0.500 0.250 3.675 3.750 3.825 5.500 5.250 6.000
2 1/4 -- 0.444 0.250 3.300 3.375 3.450 5.000 4.750 5.500
2 3/4 -- 0.500 0.250 4.050 4.125 4.200 6.000 5.750 6.500
3 1/4 -- 0.500 0.250 4.775 4.875 4.975 7.000 -- 7.500
3 -- 0.500 0.250 4.425 4.500 4.575 6.500 -- 7.000
3 1/2 -- 0.500 0.250 5.150 5.250 5.350 7.500 -- 8.000
4 -- 0.500 0.250 5.900 6.000 6.100 8.500 -- 9.000
UNS N08020 washers dimension
Nominal Size T Clipped Width E, Min.
O.D. I.D. Standard Extra Thick
[Note (1)] Min. Max. Min. Max. Min. Max. Min. Max. [Note (2)]
16 32.4 34 18 18.4 3.1 4.6 8 10 14
12 25.7 27 14 14.4 3.1 4.6 8 10 10.5
20 40.4 42 22 22.5 3.1 4.6 8 10 17.5
24 48.4 50 26 26.5 3.4 4.6 8 10 21
22 42.4 44 24 24.5 3.4 4.6 8 10 19.2
27 S4.1 56 30 30.5 3.4 4.6 8 10 23.6
36 70.1 72 39 39.6 3.4 4.6 8 10 31.S
30 58.1 60 33 33.6 3.4 4.6 8 10 26.2
42 81.8 84 45 45.6 4.6 7.2 8 10 36.7
56 104.8 107 62 62.7 6.1 8.7 8 10 49
100 173.5 176 107 107.9 6.1 8.7 8 10 87.5
48 92.8 95 52 52.7 4.6 7.2 8 10 42
64 115.8 118 70 70.7 6.1 8.7 8 10 56
80 139.5 142 86 86.9 6.1 8.7 8 10 70
72 127.5 130 78 78.7 6.1 8.7 8 10 63
90 156.5 159 96 96.9 6.1 8.7 8 10 78.7
How alloy 20 nuts are selected? what factor should keep in mind?

Factors that should be kept in mind while choosing alloy 20 nuts are:

  • The material must show corrosion resistance in the specific media present in the application.
  • The material withstands the required temperatures without any loss of mechanical properties.
  • They must meet the required specifications and quality standards.
  • The nut type and size must be as per the specific application requirements and the type of fastening needed.
  • Select nuts with appropriate strength and locking features as per the maximum expected load, vibration, etc.
  • The flange material must be compatible with the corresponding bolt material.
  • Always purchase from renowned manufacturers and suppliers like Regent Steel & Engineering Co. They offer quality products at the best prices and timely deliveries.
What is the difference between 20cb3 fasteners and fixings?

20cb3 fasteners provide secure and reliable connections. They are used in applications where corrosion resistance and strength are crucial. Fixings refer to a broader range of components used for securing or fixing objects. This can include threaded like alloy 20 socket head cap screw and non threaded fasteners which can secure objects to surfaces.

How is UNS N08020 bolt stiffness calculated?

Obtain the necessary alloy 20 bolts material properties like Young's modulus and the cross-sectional area of the bolt.

The axial stiffness (k) of the bolt can be calculated using the formula:

k = (E * A) / L

where,

  • E is Young's modulus
  • A is the cross-sectional area
  • L is the length of the bolt

If multiple bolts are used in a joint, the overall stiffness can be calculated by summing the individual stiffness values.

FAQ
Is alloy 20 fasteners austenitic stainless steel?

an austenitic

What is the main difference between Alloy 20 and 316 SS bolts?

alloy 20 is slightly stronger than SS316

What is most important use of carpenter 20 hex bolts ?

for flue-gas desulfurization

What are DIN 2.4660 non threaded fasteners?

clips, pins, and rivets

How to calculate UNS N08020 bolts torque?

τ = | r | | F | s

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