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Alloy 20 Fasteners

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Manufacturer, Exporter & Supplier of
Alloy 20 Fasteners

Alloy 2.4660 Fasteners, Alloy 20 Fasteners, Astm A366 Alloy Hex Bolts, Alloy 20 Heavy Hex Nuts Exporter, Alloy 20 T-Head Bolts, Alloy 20 Stud Bolts, Alloy 20 Washers, Alloy 20 Anchor Bolts, ASTM B366 Alloy 20 Fasteners, Alloy 20 Fasteners, Alloy N08020 Fasteners, Alloy 20Cb-3® Fasteners Exporter, Alloy 20 Fasteners Stockist in Mumbai India.

Honesty Steel & Alloys Ltd. is a manufacturer, exporter and supplier of Alloy 20 Fasteners, offering high-performance fastening solutions for demanding industrial applications. Alloy 20, also known as Carpenter 20 / UNS N08020, is an austenitic nickel-iron-chromium alloy developed for excellent resistance to corrosion, particularly in environments containing sulfuric acid and other aggressive chemicals.

We supply Alloy 20 Hex Bolts, Heavy Hex Bolts, Nuts, Washers, Stud Bolts, Threaded Rods, Screws, U-Bolts, Eye Bolts and custom-designed fasteners. Products can be manufactured or supplied in metric and imperial dimensions with different thread configurations, lengths, head styles and surface finishes.

Our Alloy 20 bolts and nuts are designed to provide compatible fastening assemblies in corrosive environments. We can supply standard and heavy-duty configurations as well as customized fasteners manufactured according to drawings and technical specifications. Alloy 20 bolts can be supplied in hex-head, heavy-hex, socket-head, flange and other configurations. Alloy 20 nuts include hex nuts, heavy hex nuts, lock nuts, flange nuts, jam nuts and customized designs. Alloy 20 screws can be supplied as machine screws, socket screws, set screws and other application-specific configurations.

Alloy 20 stud bolts are commonly used in flanged piping and pressure-equipment connections. Studs can be supplied as full-thread studs, double-end studs and custom-length configurations. Alloy 20 threaded rods are available in metric and imperial diameters and can be supplied in standard or customer-specified lengths.

Alloy 20 Nuts, Alloy 20Cb-3® Socket Screws, Carpenter 20 Washers, Alloy 20 Heavy Hex Bolts, Incoloy® Alloy 20 Anchor Bolts Dealer, Alloy 20 Bolts, Alloy 20 Anchor Fasteners, Alloy 20 Eye Bolts, Din 2.4660 Fasteners Manufacturer, Alloy 20 Mushroom Head Square Neck, Uns N08020 Pan Head Screw, Alloy 20 U Bolts, Alloy 20 Heavy Hex Bolts, Alloy 20 Fasteners Supplier, ASME SB366 Alloy 20 Fasteners Supplier in India.

Alloy 20 Fasteners Specifications

Product Alloy 20 Fasteners
Alloy Alloy 20 / Carpenter 20
Grade Alloy 20 / Alloy 20CB-3
Standards ASTM / ASME, ISO, DIN, BS, EN
Bolt Standards ASME B18.2.1, DIN, ISO, BS
Nut Standards ASME B18.2.2, DIN, ISO, BS
Screw Standards ASME / ISO / DIN / BS
Thread Metric / UNC / UNF / BSW / BSF
Thread Type Coarse / Fine
Surface Plain / Passivated / Polished
Finish Natural / Bright / Customized
Types Nuts, Bolts, Screws, Socket Screw, Sockets, Studs, Screw, Nut, Spring Washers, Hex Set Screw, Socket Hexagon Head Screw, Cap Screw, Wing Screw, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw, Washers, Studs, Anchors, Hex Nut,Marine Anchors, Hexagon Nut, Hex Coupling Nut, Hex Domed Cap Nuts, Square Nut, Stud Bolts, Hex Head Bolts, Anchor Bolt, U- Bolts, J Bolts, T-Head Bolts, Mushroom Head Square Neck Bolts, Eye Bolt, Foundation Bolts, Structural Bolts
Manufacturing Cold Forged / Hot Forged / Machined
Size Metric & Imperial
Supply Condition Annealed / Cold Worked / As Specified
Application Industrial, Construction, Engineering, Fabrication

Equivalent Chart of Alloy 20 Fasteners

STANDARD UNS WNR. AFNOR EN
Alloy 20 N08020 2.4660 Z2NCUD31-20AZ NiCr20CuMo

Chemical Composition of Alloy 20 Fasteners

Grade Ni C Mn P S Si Cr Nb Mo Cu
Alloy 20 32 - 38 0.02 max 1 - 2 0.02 max 0.005 max 0.7 max 19 - 21 0.1 - 0.3 2 - 3 3 - 4

Mechanical Properties of Alloy 20 Fasteners

Grade Tensile strength Yield strength Elongation %
Alloy 20 Psi -80,000, MPa -551 Psi - 35,000, MPa - 241 30

Types of Alloy 20 Fasteners

Alloy 20 Carriage Bolts

Alloy 20 Eye Bolts

Alloy 20 Self Tapping Screws

Alloy 20 Anchor Bolt

Alloy 20 Socket Set Screw

Alloy 20 Countersunk Washers

Alloy 20 Socket Screws

Alloy 20 Hex Coupling Nut

Alloy 20 Hex Bolts

Alloy 20 Lock Nuts

Alloy 20 Shoulder Screw Bolts

Alloy 20 Structural Bolts

Alloy 20 Washers

Alloy 20 Pan Head Screws

Alloy 20 Stud Bolts

Alloy 20 Flanged Bolts

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Manufacturing Standards of Alloy 20 Fasteners

Types Size Range Class Standards
Hex Nut M3 to M30 A2 – 70/80, A4 – 70/80 DIN 934 / ISO 4032
Hex Head Screw (Full Thread) M3 to M30 A2 – 70/80, A4 – 70/80 DIN 933 / ISO 4017
Hex Head Bolt (Partial Thread) M4 to M30 A2 – 70/80, A4 – 70/80 DIN 931 / ISO 4014
Threaded Rod M3 to M36 A2 – 70/80, A4 – 70/80 DIN 975
Plain Washer M3 to M64 A2, A4 DIN 125 A
Flat – Section Spring Washer M3 to M36 A2, A4 DIN 127 B
Square – Section Spring Washer M3 to M36 A2, A4 DIN 7980
Socket Head Cap Screw M3 to M30 A2 – 70/80, A4 – 70/80 DIN 912 / ISO 4762

Imperial Size Range of Alloy 20 Fasteners

Product Typical Imperial Range
Bolts 1/8" to 4"
Screws 1/8" to 2"
Nuts 1/8" to 4"
Washers 1/8" to 4"
Studs 1/4" to 4"
Threaded Rods 1/4" to 4"

ANSI/ASME Standards (INCH SERIES)

ASME B18.1.1 Small Solid Rivets ASME B18.8.1 Clevis Pins and Cotter Pins
ASME B18.1.2 Large Rivets ASME B18.8.2 Taper Pins, Dowel Pins, Straight Pins, Grooved Pins and Spring Pins
ASME B18.2.1 Square and Hex Bolts and Screws ASME B18.9 Plow Bolts
ASME B18.2.2 Square and Hex Nuts ASME B18.10 Track Bolts and Nuts
ASME B18.2.6 Fasteners for use in Structural Applications ASME B18.11 Miniature Screws
ASME B18.3 Socket Cap, Shoulder and Set Screws ASME B18.13 Screws and Washer Assemblies (Sems)
ASME B18.5 Round Head Bolts ASME B18.15 Forged Eyebolts
ASME B18.6.2 Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws ASME B18.17 Wing Nuts, Thumb Screws and Wing Screws
ASME B18.6.3 Machine Screws and Machine Screws Nuts ASME B18.21.1 Lock Washers
ASME B18.6.4 Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws ASME B18.22.1 Plain Washers
ASME B18.7 General Purpose Semi- Tubular Rivets, Full Tubular Rivets, Split Rivets and Rivet Caps ASME B18.23.1 Beveled Washers

Alloy 20 Bolt Dimensions & Size Chart

Nominal or Basic Product Diameter E F G H J LT (Thread Length) Y
Body Diameter Width Across Flats Width Across Corners Head Height Wrenching Height For Screw Lengths For Screw Lengths Transition Thread Length
1/4 0.25 0.25 0.245 7/16 0.438 0.428 0.505 0.488 5/32 0.163 0.150 0.106 0.750 1.000 0.250
5/16 0.3125 0.3125 0.3065 1/2 0.500 0.489 0.577 0.557 13/64 0.211 0.195 0.140 0.875 1.125 0.278
3/8 0.375 0.375 0.369 9/16 0.562 0.551 0.650 0.628 15/64 0.243 0.226 0.160 1.000 1.250 0.312
7/16 0.4375 0.4375 0.4305 5/8 0.625 0.612 0.722 0.698 9/32 0.291 0.272 0.195 1.125 1.375 0.357
1/2 0.5 0.5 0.493 3/4 0.750 0.736 0.866 0.840 5/16 0.323 0.302 0.215 1.250 1.500 0.385
9/16 0.5625 0.5625 0.5545 13/16 0.812 0.798 0.938 0.910 23/64 0.371 0.348 0.250 1.375 1.625 0.417
5/8 0.625 0.625 0.617 15/16 0.938 0.922 1.083 1.051 25/64 0.403 0.378 0.269 1.500 1.750 0.455
3/4 0.75 0.75 0.741 1-1/8 1.125 1.100 1.299 1.254 15/32 0.483 0.455 0.324 1.750 2.000 0.500
7/8 0.875 0.875 0.866 1-5/16 1.312 1.285 1.516 1.465 35/64 0.563 0.531 0.378 2.000 2.250 0.556
1 1 1 0.99 1-1/2 1.500 1.469 1.732 1.675 39/64 0.627 0.591 0.416 2.250 2.500 0.625
1-1/8 1.125 1.125 1.114 1-11/16 1.688 1.631 1.949 1.859 11/16 0.718 0.658 0.461 2.500 2.750 0.714
1-1/4 1.25 1.25 1.239 1-7/8 1.875 1.812 2.165 2.066 25/32 0.813 0.749 0.530 2.750 3.000 0.714
1-1/2 1.5 1.5 1.488 2-1/4 2.250 2.175 2.598 2.480 15/16 0.974 0.902 0.640 3.250 3.500 0.833

Alloy 20 Nuts Dimension & Size Chart

Nominal Size or Basic Major Thread Diameter F G H
Width Across Flats Width Across Corners Thickness
Basic Max Min Max Min Basic Max Min
1/4 .2500 1/2 .500 .488 .577 .556 15/64 .250 .218
5/16 .3125 9/16 .562 .546 .650 .622 19/64 .314 .280
3/8 .3750 11/16 .688 .669 .794 .763 23/64 .377 .341
7/16 .4375 3/4 .750 .728 .866 .830 27/64 .441 .403
1/2 .5000 7/8 .875 .850 1.010 .969 31/64 .504 .464
9/16 .5625 15/16 .938 .909 1.083 1.037 35/64 .568 .526
5/8 .6250 1-1/16 1.062 1.031 1.227 1.175 39/64 .631 .587
3/4 .7500 1-1/4 1.250 1.212 1.443 1.382 47/64 .758 .710
7/8 .8750 1-7/16 1.438 1.394 1.660 1.589 55/64 .885 .833
1 1.0000 1-5/8 1.325 1.575 1.876 1.796 63/64 1.012 .956
1-1/8 1.1250 1-13/16 1.812 1.756 2.093 2.002 1-7/64 1.139 1.079
1-1/4 1.2500 2 2.000 1.938 2.309 2.209 1-7/32 1.251 1.187
1-3/8 1.3750 2-3/16 2.188 2.119 2.526 2.416 1-11/32 1.378 1.460
1-1/2 1.5000 2-3/8 2.375 2.300 2.742 2.622 1-15/32 1.505 1.433
1-5/8 1.6250 2-9/16 2.562 2.481 2.959 2.828 1-19/32 1.632 1.556
1-3/4 1.7500 2-3/4 2.750 2.662 3.175 3.035 1-23/32 1.759 1.679
2 2.0000 3-1/8 3.125 3.025 3.608 3.449 1-31/32 2.013 1.925
2-1/4 2.2500 3-1/2 3.500 3.388 4.041 3.862 2-13/64 2.251 2.155
2-1/2 2.5000 3-7/8 3.875 3.750 4.474 4.275 2-29/64 2.505 2.401
2-3/4 2.7500 4-1/4 4.250 4.112 4.907 4.688 2-45/64 2.759 2.647
3 3.0000 4-5/8 4.625 4.475 5.340 5.102 2-61/64 3.013 2.893
3-1/4 3.2500 5 5.000 4.838 5.774 5.515 3-3/16 3.252 3.124
3-1/2 3.5000 5-3/8 5.375 5.200 6.207 5.928 3-7/16 3.506 3.370
3-3/4 3.7500 5-3/4 5.750 5.562 6.640 6.341 3-11/16 3.670 3.616
4 4.0000 6-1/8 6.125 5.925 7.073 6.755 3-15/16 4.014 3.862

Alloy 20 Hex Bolts Dimensions & Size Chart

Nominal Size (Inch) Basic Diameter (mm) Full-Size Body Diameter (E) Width Across Flats (F) Width Across Corners (G) Head Height (H) Fillet Radius (R) Nominal Thread Length (LT)
Max Min Basic (inch) Max Min Max Min Basic (inch) Max Min Max Min 6 in. & Shorter Over 6 in.
1/4 0.25 0.26 0.237 7/16 0.438 0.425 0.505 0.484 11/64 0.188 0.15 0.03 0.01 0.75 1.0
5/16 0.3125 0.324 0.298 1/2 0.5 0.484 0.577 0.552 7/32 0.235 0.195 0.03 0.01 0.875 1.125
3/8 0.375 0.388 0.36 9/16 0.562 0.544 0.65 0.62 1/4 0.268 0.226 0.03 0.01 1.0 1.25
7/16 0.4375 0.452 0.421 5/8 0.625 0.603 0.722 0.687 19/64 0.347 0.272 0.03 0.01 1.125 1.375
1/2 0.5 0.515 0.482 3/4 0.75 0.725 0.866 0.826 11/32 0.364 0.302 0.03 0.01 1.25 1.5
5/8 0.625 0.642 0.605 15/16 0.938 0.906 1.083 1.033 27/64 0.444 0.378 0.06 0.02 1.5 1.75
3/4 0.75 0.768 0.729 1 1/8 1.125 1.088 1.299 1.24 1/2 0.524 0.455 0.06 0.02 1.75 2.0
7/8 0.875 0.895 0.852 1 5/16 1.312 1.269 1.516 1.447 37/64 0.604 0.531 0.06 0.02 2.0 2.25
1 1.0 1.022 0.976 1 1/2 1.5 1.45 1.732 1.653 43/64 0.7 0.591 0.09 0.03 2.25 2.5
1 1/8 1.125 1.149 1.098 1 11/16 1.688 1.631 1.949 1.859 3/4 0.78 0.658 0.09 0.03 2.5 2.75
1 1/4 1.25 1.277 1.223 1 7/8 1.875 1.812 2.165 2.066 27/32 0.876 0.749 0.09 0.03 2.75 3.0
1 3/8 1.375 1.404 1.345 2 1/16 2.062 1.994 2.382 2.273 29/32 0.94 0.81 0.09 0.03 3.0 3.25
1 1/2 1.5 1.531 1.47 2 1/4 2.25 2.175 2.598 2.48 1 1.036 0.902 0.09 0.03 3.25 3.5
1 5/8 1.625 1.658 1.591 2 7/16 2.438 2.356 2.815 2.616 1 3/32 1.116 0.978 0.09 0.03 3.5 3.75
1 3/4 1.75 1.785 1.716 2 5/8 2.625 2.538 3.031 2.893 1 5/32 1.196 1.054 0.12 0.04 3.75 4.0
1 7/8 1.875 1.912 1.839 2 13/16 2.812 2.719 3.248 3.099 1 1/4 1.276 1.13 0.12 0.04 4.0 4.25
2 2.0 2.039 1.964 3 3.0 2.9 3.464 3.306 1 11/32 1.388 1.175 0.12 0.04 4.25 4.5
2 1/4 2.25 2.305 2.214 3 3/8 3.375 3.262 3.897 3.719 1 1/2 1.548 1.327 0.19 0.06 4.75 5.0
2 1/2 2.5 2.559 2.461 3 3/4 3.75 3.625 4.33 4.133 1 21/32 1.708 1.479 0.19 0.06 5.25 5.5
2 3/4 2.75 2.827 2.711 4 1/8 4.125 3.988 4.763 4.546 1 13/16 1.869 1.632 0.19 0.06 5.75 6.0
3 3.0 3.081 2.961 4 1/2 4.5 4.35 5.196 4.959 2 2.06 1.815 0.19 0.06 6.25 6.5
3 1/4 3.25 3.335 3.21 4 7/8 4.875 4.712 5.629 5.372 2 3/16 2.251 1.936 0.19 0.06 6.75 7.0
3 1/2 3.5 3.589 3.461 5 1/4 5.25 5.075 6.062 5.786 2 5/16 2.38 2.057 0.19 0.06 7.25 7.5
3 3/4 3.75 3.858 3.726 5 5/8 5.625 5.437 6.495 6.198 2 1/2 2.572 2.241 0.19 0.06 7.75 8.0
4 4.0 4.111 3.975 6 6.0 5.8 6.928 6.612 2 11/16 2.764 2.424 0.19 0.06 8.25 8.5

All dimensions are per ASME B18.2.1 Hex Bolt Standards.

Alloy 20 Heavy Hex Nuts & Heavy Hex Jam Nuts Dimensions

Nominal Size (inch) Basic Major Diameter of Thread (inch) Width Across Flats (F) Width Across Corners (G) Thickness of Heavy Hex Nuts (H) Thickness of Heavy Hex Jam Nuts (H1) Max Runout (FIM)
Basic Min Max Min Max Basic Min Max Basic Min Max Up to 150k psi 150k psi & greater All grades
1/4 0.2500 1/2 0.488 0.500 0.556 0.577 15/64 0.218 0.250 11/64 0.156 0.188 0.017 0.011 0.017
5/16 0.3125 9/16 0.546 0.562 0.622 0.650 19/64 0.280 0.314 13/64 0.186 0.220 0.020 0.012 0.020
3/8 0.3750 11/16 0.669 0.688 0.763 0.794 23/64 0.341 0.377 15/64 0.216 0.252 0.021 0.014 0.021
7/16 0.4375 3/4 0.728 0.750 0.830 0.866 27/64 0.403 0.441 17/64 0.247 0.285 0.022 0.015 0.022
1/2 0.5000 7/8 0.850 0.875 0.969 1.010 31/64 0.464 0.504 19/64 0.277 0.347 0.023 0.016 0.023
9/16 0.5625 15/16 0.909 0.938 1.037 1.083 35/64 0.526 0.568 21/64 0.307 0.349 0.024 0.017 0.024
5/8 0.6250 1 1/16 1.031 1.062 1.175 1.227 39/64 0.587 0.631 23/64 0.337 0.381 0.025 0.018 0.025
3/4 0.7500 1 1/4 1.212 1.250 1.382 1.443 47/64 0.710 0.758 27/64 0.398 0.446 0.027 0.020 0.027
7/8 0.8750 1 7/16 1.394 1.438 1.589 1.660 55/64 0.833 0.885 31/64 0.458 0.510 0.029 0.022 0.029
1 1.0000 1 5/8 1.575 1.625 1.796 1.876 63/64 0.956 1.012 35/64 0.519 0.575 0.031 0.024 0.031
1 1/8 1.1250 1 13/16 1.756 1.812 2.002 2.093 1 7/64 1.079 1.139 39/64 0.579 0.639 0.033 0.027 0.033
1 1/4 1.2500 2 1.938 2.000 2.209 2.309 1 7/32 1.187 1.251 23/32 0.687 0.751 0.035 0.030 0.035
1 3/8 1.3750 2 3/16 2.119 2.188 2.416 2.526 1 11/32 1.347 1.378 25/32 0.747 0.815 0.038 0.033 0.038
1 1/2 1.5000 2 3/8 2.300 2.375 2.622 2.742 1 15/32 1.433 1.505 27/32 0.808 0.880 0.041 0.036 0.041
1 5/8 1.6250 2 9/16 2.481 2.562 2.828 2.959 1 19/32 1.556 1.632 29/32 0.868 0.944 0.044 0.038 0.044
1 3/4 1.7500 2 3/4 2.662 2.750 3.035 3.175 1 23/32 1.679 1.759 31/32 0.929 1.009 0.048 0.041 0.048
1 7/8 1.8750 2 15/16 2.844 2.938 3.242 3.392 1 27/32 1.802 1.886 1 1/32 0.989 1.073 0.051 0.044 0.051
2 2.0000 3 1/8 3.025 3.125 3.449 3.608 1 31/32 1.925 2.013 1 3/32 1.050 1.138 0.055 0.047 0.055
2 1/4 2.2500 3 1/2 3.388 3.500 3.862 4.041 2 13/64 2.155 2.251 1 13/64 1.155 1.251 0.061 0.052 0.061
2 1/2 2.5000 3 7/8 3.750 3.875 4.275 4.474 2 29/64 2.401 2.505 1 29/64 1.401 1.505 0.068 0.058 0.068
2 3/4 2.7500 4 1/4 4.112 4.250 4.688 4.907 2 45/64 2.647 2.759 1 37/64 1.522 1.634 0.074 0.064 0.074
3 3.0000 4 5/8 4.475 4.625 5.102 5.340 2 61/64 2.893 3.013 1 45/64 1.643 1.763 0.081 0.070 0.081
3 1/4 3.2500 5 4.838 5.000 5.515 5.774 3 3/16 3.124 3.252 1 13/16 1.748 1.876 0.087 0.075 0.087
3 1/2 3.5000 5 3/8 5.200 5.375 5.928 6.207 3 7/16 3.370 3.506 1 15/16 1.870 2.006 0.094 0.081 0.094
3 3/4 3.7500 5 3/4 5.562 5.750 6.341 6.640 3 11/16 3.616 3.760 2 1/16 1.990 2.134 0.100 0.087 0.100
4 4.0000 6 1/8 5.925 6.125 6.755 7.073 3 15/16 3.862 4.014 2 3/16 2.112 2.264 0.107 0.093 0.107

All dimensions are as per ASME B18.2.2 Heavy Hex Nuts and Heavy Hex Jam Nuts standards.

Alloy 20 Washers Dimensions

Bolt Size A B C Weight (lbs.) Per 100 Pieces
ID OD Thickness
1/2 9/16 13/8 0.109 4
5/8 11/16 13/4 0.134 8
3/4 13/16 2 0.148 11
7/8 15/16 21/4 0.165 15
1 11/16 21/2 0.165 19
11/8 11/4 23/4 0.165 22
11/4 13/8 3 0.165 26
13/8 11/2 31/4 0.180 33
11/2 15/8 31/2 0.180 38
15/8 13/4 33/4 0.180 43
13/4 17/8 4 0.180 50
17/8 2 41/4 0.180 57
2 21/8 41/2 0.180 63
21/4 23/8 43/4 0.220 83
21/2 25/8 5 0.238 96
23/4 27/8 51/4 0.259 110
3 31/8 51/2 0.284 130

Alloy 20 Stud Bolts Dimension & Size Chart

Class 150 Flanges ASME B16.5 (Stud bolt sizes) Length of Stud Bolts 
NPS Outside Diameter of Flange The diameter of Bolt Circle The diameter of Bolt Holes Number of Bolts Diameter of Bolts Raised Face
0.06 in		 Ring Joint
1/2 3 1/2 2 3/8 5/8 4 1/2 2 1/4 –
3/4 3 7/8 2 3/4 5/8 4 1/2 2 1/2 –
1 4 1/4 3 1/8 5/8 4 1/2 2 1/2 3
1 1/4 4 5/8 3 1/2 5/8 4 1/2 2 3/4 3 1/4
1 1/2 5 3 7/8 5/8 4 1/2 2 3/4 3 1/4
2 6 4 3/4 3/4 4 5/8 3 1/4 3 3/4
2 1/2 7 5 1/2 3/4 4 5/8 3 1/2 4
3 7 1/2 6 3/4 4 5/8 3 1/2 4
3 1/2 8 1/2 7 3/4 8 5/8 3 1/2 4
4 9 7 1/2 3/4 8 5/8 3 1/2 4
5 10 8 1/2 7/8 8 3/4 3 3/4 4 1/4
6 11 9 1/2 7/8 8 3/4 4 4 1/2
8 13 1/2 11 3/4 7/8 8 3/4 4 1/4 4 3/4
10 16 14 3/4 1 12 7/8 4 1/2 5
12 19 17 1 12 7/8 4 3/4 5 1/4
14 21 18 3/4 1 1/8 12 1 5 1/4 5 3/4
16 23 1/2 21 1/4 1 1/8 16 1 5 1/4 5 3/4
18 25 22 3/4 1 1/4 16 1 1/8 5 3/4 6 1/4
20 27 1/2 25 1 1/4 20 1 1/8 6 1/4 6 3/4
24 32 29 1/2 1 1/4 20 1 1/4 6 3/4 7 1/4
Class 300 Flanges ASME B16.5 Length of Stud Bolts 
NPS Outside Diameter of Flange The diameter of Bolt Circle The diameter of Bolt Holes Number of Bolts Diameter of Bolts Raised Face
0.06 in		 Ring Joint
1/2 3 3/4 2 5/8 5/8 4 1/2 2 1/2 3
3/4 4 5/8 3 1/4 3/4 4 5/8 3 3 1/2
1 4 7/8 3 1/2 3/4 4 5/8 3 3 1/2
1 1/4 5 1/4 3 7/8 3/4 4 5/8 3 1/4 3 3/4
1 1/2 6 1/8 4 1/2 7/8 4 3/4 3 1/2 4
2 6 1/2 5 3/4 8 5/8 3 1/2 4
2 1/2 7 1/2 5 7/8 7/8 8 3/4 4 4 1/2
3 8 1/4 6 5/8 7/8 8 3/4 4 1/4 4 3/4
3 1/2 9 7 1/4 7/8 8 3/4 4 1/4 5
4 10 7 7/8 7/8 8 3/4 4 1/2 5
5 11 9 1/4 7/8 8 3/4 4 3/4 5 1/4
6 12 1/2 10 5/8 7/8 12 3/4 4 3/4 5 1/2
8 15 13 1 12 7/8 5 1/2 6
10 17 1/2 15 1/4 1 1/8 16 1 6 1/4 6 3/4
12 20 1/2 17 3/4 1 1/4 16 1 1/8 6 3/4 7 1/4
14 23 20 1/4 1 1/4 20 1 1/8 7 7 1/2
16 25 1/2 22 1/2 1 3/8 20 1 1/4 7 1/2 8
18 28 24 3/4 1 3/8 24 1 1/4 7 3/4 8 1/4
20 30 1/2 27 1 3/8 24 1 1/4 8 8 3/4
24 36 32 1 5/8 24 1 1/2 9 10

Alloy 20 Screws Size Chart

Screw Diameter Typical Metric Sizes Available Head Styles
Small M3–M5 Pan / Flat / Button
Medium M6–M10 Hex / Socket / Pan / Flat
Large M12–M16 Socket / Hex / Customized
Heavy M18 and above Customized / Industrial

Alloy 20 Fasteners Regular Standards

Hexagon Bolt / Set Screws Stud Bolt Hexagon Nuts Socket Cap screws
DIN 931 BS4882 DIN 934 DIN 912
DIN 933 DIN 976 BS 1768 DIN 6912
BS 1768 BS 1769 DIN 7984
UNI 5731 BS 1083 ANSI B18.3
UNI 5739 BS 3692 ISO 4762
ISO 4014 ISO 4032 UNI 5931
ISO 4017 ISO 4033 BS 2470
BS 1769 ANSI B18.2.2 BS 4168
BS 3692
ANSI B18.2.1
Socket & Slotted Set Screws Socket & Slotted Countersunk Screws Studs Washers
DIN 913 DIN 963 DIN 938 DIN 125
DIN 914 DIN 7991 DIN 939 DIN 9021
DIN 915 BS 4168 DIN 2510 BS 4320
DIN 916 BS 1981 BS 4439 BS 3410
DIN 551 BS 483 BS 2693
DIN 553 BS 2470 Spring Washers
DIN 438 DIN 127
BS 4168 BS 4464
BS 1802

Alloy 20 Fasteners Inventory

  • Incoloy Alloy 20 U Bolts
  • Nickel Alloy 20 Partially Threaded Stud Bolt
  • Alloy 20 Fasteners
  • Alloy 20 Button Head Cap Screws
  • Incoloy Alloy 20 Carriage Bolts
  • ASME B18.5 Alloy 20 Round Head Bolts
  • Alloy 20 Hex Flange Bolt
  • Alloy N08020 Fastener
  • Carpenter 20 Spring Washer
  • Alloy 20 Flat Washers
  • Alloy 20cb3 Counter Sunk Bolts
  • Alloy 20 Single End Stud
  • Alloy 20 Hex Cap Nuts
  • Inconel 20 Fastener Stocks
  • Alloy 20cb3 Stud Bolts
  • Alloy 20 Hex Weld Nuts
  • Alloy 20 Double End Stud Bolts
  • ASME B18.2.1 Alloy 20 Stud Bolts
  • Nickel Alloy 20 Allen Bolts
  • Alloy 20 Tie Rods
  • Alloy 20 Fender Washers
  • ASME / ANSI B18.22.1 Alloy 20 Plain Washers
  • Alloy 20cb3 Socket Head Screw
  • Carpenter 20 Fully Threaded Stud Bolts
  • Alloy 20cb3 Heavy Hex Bolts
  • Nickel Alloy 20 Nylock Nuts
  • Alloy 20 Washers
  • UNS N08020 Fasteners
  • Incoloy Alloy 20 Threaded Rods
  • ASME B18.6.3 Alloy 20 Slotted Round Head Machine Screws
  • Nickel Alloy 20 Square Nuts
  • Alloy 2.4660 Fastener
  • Alloy 20 Flange Nuts
  • Carpenter 20 Dome Nuts
  • Nickel Alloy 20 Hex Coupling Nut
  • Inconel 20 Eye Nuts
  • Nickel Alloy 20 Oval Head Screw
  • Alloy 20 Nuts
  • Incoloy Alloy 20 Fasteners
  • Alloy 20 Hex Nuts
  • Inconel 20 Round Washers
  • Alloy 20 Flat Head Screws
  • Alloy 20 Ancher Bolts
  • Alloy 20 Industrial Fasteners
  • Alloy 20cb3 Screw

We Export this Alloy 20 Fasteners to countries such as Afghanistan, Albania, Andorra, Austria, Bahrain, Bangladesh, Bhutan, Brunei, Belarus, Belgium, Bulgaria, Cambodia, China, Cyprus, Croatia, Czech Republic, Denmark, Estonia, Egypt, Finland, France, Germany, Greece, Georgia, Hungary, Iceland, Ireland, Italy, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Latvia, Latin America, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal, North Korea, Netherlands, Norway, Oman, Poland, Portugal, Pakistan, Palestine, Philippines, Qatar, Russia, Romania, Russia, San Marino, Serbia and Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland, Saudi Arabia, Singapore, South Korea, South Africa, Sri Lanka, Syria, Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Kingdom, United Arab Emirates (UAE), Uzbekistan, Vietnam, Yemen

We Supply Alloy 20 Fasteners to cities including Mumbai, Delhi, Kolkata, Chennai, Bengaluru, Hyderabad, Ahmadabad, Pune, Surat, Jaipur, Kanpur, Lucknow, Nagpur, Ghaziabad, Indore, Coimbatore, Kochi, Patna, Kozhikode, Bhopal, Thrissur, Vadodara, Agra, Malappuram, Thiruvananthapuram, Kannur, Ludhiana, Nashik, Vijayawada, Madurai, Varanasi, Meerut, Faridabad, Rajkot, Jamshedpur, Srinagar, Jabalpur, Asansol, Vasai Virar City, Allahabad, Dhanbad, Aurangabad, Amritsar, Jodhpur, Ranchi, Raipur, Kollam, Gwalior, Durg-Bhilainagar, Chandigarh, Tiruchirappalli, Kota
Fasteners
Product Range
Sheets, Plates & Coils
Pipes & Tubes
Pipe Fittings
Forged Fittings
Round Bars
Flanges
Fasteners
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