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316 or 316L grades of austenitic stainless steel are used to make heavy hex nuts, or ASTM A194 Grade 8M nuts. These nuts are frequently employed in corrosive, high-temperature settings where superior corrosion resistance and increased temperatures are necessary. When it comes to chemical processing, maritime equipment, and offshore constructions, ASTM A194 Grade 8M nuts are usually used in tandem with high-strength bolts like ASTM A193 Grade B8M bolts. They go through rigorous testing to guarantee adherence to ASTM standards, offering dependable and long-lasting fastening solutions for important applications exposed to challenging circumstances.
Quick Section Links
- ASTM A194 Gr. 8M Nuts Specifications
- ASTM A194 Gr. 8M Nuts Size Chart
- ASTM A194 Gr. 8M Hex Nut Dimensions
- ASTM A194 Gr. 8M Nuts Equivalent Grade
- ASTM A194 Gr. 8M Nuts Inventory
- ASTM A194 Gr. 8M Heavy Hex Nuts Dimension
- ASTM A194 Gr. 8M Nuts Chemical Composition
- ASTM A194 Gr. 8M Nuts Mechanical Properties
- Available Stock of ASTM A194 Gr. 8M Nuts
- Applications of ASTM A194 Gr. 8M Nuts
ASTM A194 GR. 8M Nuts Specifications
| Grade | ASTM A194 Grade 8M |
| 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. 8M 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. 8M 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. 8M Nuts Equivalent Grade
| Standards | Designation | UNS |
| ASTM | A194 | Grade : 8M , AISI 316 Stainless Steel Hex Nuts. | S31600 |
ASTM A194 GR. 8M Nuts Inventory
ASTM A194 GR. 8M Hex Nuts
ASTM A194 GR. 8M Lock Nuts
ASTM A194 GR. 8M Wing Nuts
ASTM A194 GR. 8M 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. 8M Nuts Chemical Composition
| ASTM | A194 Grade 8M |
| Percentage | % |
| C. | 0.08M % |
| Mn. | 2.00 % |
| Si. | 1.00 % |
| P. | 0.05 %. |
| S. | 0.03 % |
| Cr. | 18.0-20.0 % |
| Ni. | 8.0-11.0 |
| Mo. | — |
ASTM A194 GR. 8M Nuts Mechanical Properties
| Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa) | Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa) | Elongation in 4D (El) | Reduction | Hardness – (BHN) |
| 550 | 240 | 30 | 40 | 223 |
Available Stock of ASTM A194 GR. 8M Nuts
- ASTM A194 GR. 8M Panel Nut
- ASTM A194 GR. 8M Nut
- ASTM A194 GR. 8M Self Locking Nuts
- ASTM A194 GR. 8M Hex Nut
- ASTM A194 GR. 8M Spring T Nuts
- ASTM A194 8M UNS S30400 Dome Nuts
- ASTM A194 GR. 8M | ASME B18.2.1 High Nuts
- ASME B18M.2.1 ASTM A194 8M Nuts
- ASTM A194 GR. 8M Wing Nut
- ASTM A194 8M UNS S30400 Serrated Flange Nuts
- ASTM A194 GR. 8M Hexagone Nuts
- ASTM A194 GR. 8M Serrated Flange Nut
- ASTM A194 GR. 8M Hex Nuts
- ASTM A194 GR. 8M Heavy Hex Nuts
- ASTM A194 GR. 8M Flex Lock Nut
- ASTM A194 GR. 8M Structural Nuts
- ASTM A194 8M UNS S30400 Hex Nuts
- ASME SA194 Gr. 8M B18M.3 Nylon Insert Nut
- ASTM A194 GR. 8M Square Nuts
- ASTM A194 GR. 8M 2 Way Lock Nut
- ASTM A194 8M UNS S30400 Coupler Nuts
- ASTM A194 8M UNS S30400 Slotted Nut
- ASTM A194 GR. 8M Hexagon Nuts
- ASTM A194 GR. 8M 2 Way Lock Nuts
Applications of ASTM A194 GR. 8M Nuts
- Pipeline Engineering
- Marine Industry
- Chemical Industry
- Oil & gas industry
- Mechanical Engineering
- Plant Engineering
- Petrochemical Industry
- Power Industry
- Aerospace
- Food Processing Industry
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