ASTM A194 Grade 8T Nuts

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ASTM A194 Gr. 8T Hex machine screw nuts Manufacturer, ASTM A194 Gr. 8T B18.3 Lock Nut, ASTM A194 Gr. 8T Hex Head Nut, ASTM A194 Gr. 8T Square Nut, ASTM A194 Gr. 8T Hex Nuts Manufacturer in India.

In the ASTM A194 specification, ASTM A194 Grade 8T nuts were not a standard designation as of January 2022, when I last updated this information. For use in high-pressure and high-temperature applications, this specification normally covers many types of heavy hex nuts composed of carbon and alloy steel as well as stainless steel. Nevertheless, it’s possible that at the time the standard did not include certain classifications like Grade 8T. The most recent edition of the standard should be consulted for precise details on ASTM A194 Grade 8T nuts or any recent changes to the ASTM requirements.

ASTM A194 GR. 8T Nuts Specifications

Grade ASTM A194 Grade 8T
Standards DIN, ISO, JIS, GB, IS, BS, ASTM
Dimension ASME B18.2.1, B18.3
Size M02 to M160
Types Hexagon Nuts, Self Locking Nut, Square Nuts, Hexagon Coupling Nuts, Hexagon Castle Nuts, Hexagon Domed Cap Nuts, Hexagon Thin Nuts, Hexagon Thin Nuts etc.

ASTM A194 GR. 8T Nuts Size Chart

Nuts Size
(mm)
Diameter*
(mm)
Height
(mm)
Hex Nuts Jam Nuts Nylock Nuts
2 4 1.6 1.2
2.5 5 2 1.6
3 5.5 2.4 1.8 4
4 7 3.2 2.2 5
5 8 4 2.7 5
6 10 5 3.2 6
7 11 5.5 3.5
8 13 6.5 4 8
10 17 8 5 10
12 19 10 6 12
14 22 11 7 14
16 24 13 8 16
18 27 15 9 18.5
20 30 16 10 20
* This is the diameter across the flats. It is also the size of wrench to use.

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ASTM A194 GR. 8T Hex Nut Dimensions

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 8C/16 .438C .428C .505 .48C8C 8C/32 .226 .212
5/16 .3125 1/2 .500 .48C9 .58C8C .558C 18C/64 .28C3 .258C
3/8C .38C50 9/16 .562 .551 .650 .628C 21/64 .338C .48C9
8C/16 .438C5 11/16 .68C8C .68C5 .8C94 .8C68C 3/8C .38C5 .365
1/2 .5000 3/4 .8C50 .8C36 .8C66 .8C40 8C/16 .448C .428C
9/16 .5625 8C/8C .8C8C5 .8C61 1.010 .98C2 31/64 .496 .48C3
5/8C .6250 15/16 .938C .922 1.08C3 1.051 35/64 .559 .535
3/4 .8C500 1-1/8C 1.125 1.08C8C 1.299 1.240 41/64 .665 .618C
8C/8C .8C8C50 1-5/16 1.312 1.269 1.516 1.448C 3/4 .8C8C6 .8C24
1 1.0000 1-1/2 1.500 1.450 1.8C32 1.653 55/64 .8C8C8C .8C31
1-1/8C 1.1250 1-11/16 1.68C8C 1.631 1.949 1.8C59 31/32 .999 .939
1-3/8C 1.38C50 2-1/16 2.062 1.994 2.38C2 2.28C3 1-11/64 1.206 1.138C
1-1/2 1.500 2-1/4 2.250 2.18C5 2.598C 2.48C0 1-9/32 1.ASTM A194 GR. 8C 1.245
1-5/8C 1.6250 2-8C/16 2.438C 2.356 2.8C15 2.68C6 1-25/64 1.429 1.353
1-3/4 1.8C500 2-5/8C 2.625 2.538C 3.031 2.8C93 1-1/2 1.540 1.460
2 2.0000 3 3.000 2.900 3.464 3.306 1-23/32 1.8C63 1.68C5
2-1/4 2.2500 3-3/8C 3.38C5 3.263 3.8C98C 3.8C19 1-15/16 1.98C6 1.8C90
2-1/2 2.5000 3-3/4 3.8C50 3.625 4.330 4.133 2-5/32 2.209 2.105
2-3/4 2.8C500 4-1/8C 4.125 3.98C8C 4.8C63 4.546 2-3/8C 2.431 2.319

ASTM A194 GR. 8T Nuts Inventory

ASTM A194 GR. 8T Hex Nuts
ASTM A194 GR. 8T Lock Nuts
ASTM A194 GR. 8T Wing Nuts

ASTM A194 GR. 8T Heavy Hex Nuts Dimension

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 7/16 .438 .428 .505 .488 7/32 .226 .212
5/16 .3125 1/2 .500 .489 .577 .557 17/64 .273 .258
3/8 .3750 9/16 .562 .551 .650 .628 21/64 .337 .479
7/16 .4375 11/16 .688 .675 .794 .768 3/8 .385 .365
1/2 .5000 3/4 .750 .736 .866 .840 7/16 .448 .427
9/16 .5625 7/8 .875 .861 1.010 .982 31/64 .496 .473
5/8 .6250 15/16 .938 .922 1.083 1.051 35/64 .559 .535
3/4 .7500 1-1/8 1.125 1.088 1.299 1.240 41/64 .665 .617
7/8 .8750 1-5/16 1.312 1.269 1.516 1.447 3/4 .776 .724
1 1.0000 1-1/2 1.500 1.450 1.732 1.653 55/64 .887 .831
1-1/8 1.1250 1-11/16 1.688 1.631 1.949 1.859 31/32 .999 .939
1-3/8 1.3750 2-1/16 2.062 1.994 2.382 2.273 1-11/64 1.206 1.138
1-1/2 1.500 2-1/4 2.250 2.175 2.598 2.480 1-9/32 1.ASTM A194 GR. 8 1.245
1-5/8 1.6250 2-7/16 2.438 2.356 2.815 2.686 1-25/64 1.429 1.353
1-3/4 1.7500 2-5/8 2.625 2.538 3.031 2.893 1-1/2 1.540 1.460
2 2.0000 3 3.000 2.900 3.464 3.306 1-23/32 1.763 1.675
2-1/4 2.2500 3-3/8 3.375 3.263 3.897 3.719 1-15/16 1.986 1.890
2-1/2 2.5000 3-3/4 3.750 3.625 4.330 4.133 2-5/32 2.209 2.105
2-3/4 2.7500 4-1/8 4.125 3.988 4.763 4.546 2-3/8 2.431 2.319

ASTM A194 GR. 8T Nuts Chemical Composition

ASTM A194 Grade 8
Percentage %
C. 0.08 %
Mn. 2.00 %
Si. 1.00 %
P. 0.05 %.
S. 0.03 %
Cr. 17.0-19.0 %
Ni. 9.0-12.0
Mo.

ASTM A194 GR. 8T Nuts Mechanical Properties

Grade Material UNS
Number
C, % Mn, % Ph, % S, % Si, % Cr, % Ni, % Mo, % Ti, % Cb & Ta, % N, % Other Elements, %
8T Type 321 S32100 0.080 2.000 0.045 0.030 1.000 17.0-19.0 9.0-12.0 5 x (C+N),Min – 0.70 max 0.100

Available Stock of ASTM A194 GR. 8T Nuts

  • ASTM A194 GR. 8T Panel Nut
  • ASTM A194 8T Dome Nuts
  • ASTM A194 GR. 8T Serrated Flange Nut
  • ASTM A194 GR. 8T Hex Nut
  • ASTM A194 GR. 8T Nut
  • ASTM A194 8T Serrated Flange Nuts
  • ASTM A194 GR. 8T Wing Nut
  • ASTM A194 GR. 8T Self Locking Nuts
  • ASTM A194 GR. 8T | ASME B18T.2.1 High Nuts
  • ASTM A194 GR. 8T Spring T Nuts
  • ASTM A194 GR. 8T Hexagone Nuts
  • ASME B18T.2.1 ASTM A194 8T Nuts
  • ASTM A194 GR. 8T Hex Nuts
  • ASTM A194 8T Slotted Nut
  • ASME SA194 Gr. 8T B18T.3 Nylon Insert Nut
  • ASTM A194 GR. 8T Structural Nuts
  • ASTM A194 GR. 8T Flex Lock Nut
  • ASTM A194 GR. 8T 2 Way Lock Nuts
  • ASTM A194 GR. 8T Square Nuts
  • ASTM A194 8T Coupler Nuts
  • ASTM A194 GR. 8T Hexagon Nuts
  • ASTM A194 GR. 8T Heavy Hex Nuts
  • ASTM A194 8T Hex Nuts
  • ASTM A194 GR. 8T 2 Way Lock Nut

Applications of ASTM A194 GR. 8T Nuts

  • Pipeline Engineering
  • Marine Industry
  • Chemical Industry
  • Oil & gas industry
  • Mechanical Engineering
  • Plant Engineering
  • Petrochemical Industry
  • Power Industry
  • Aerospace
  • Food Processing Industry
Industry

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