ASTM A194 Grade 8M Nuts

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ASTM A194 Grade 8M Nuts Manufacturer & Supplier

ASTM A194 Grade 8M Nuts

Jade Special Metals is a leading manufacturer, supplier and exporter of high performance ASTM A194 Grade 8M Nuts. Our ASTM A194 8M Nuts are sold as the industry standard for stainless steel nuts, offering top performance in serious corrosive high temperature and cryogenic applications. Our A194 8M Nuts are manufactured from Type 316 stainless steel (UNS S31600) and are manufactured using high quality German equipment for consistent and reliable performance. We maintain a stocked inventory of ASTM A194 Gr.8M heavy hex nuts, providing certified quality and competitive pricing for the chemical processing, marine, and energy industries worldwide.

What Are ASTM A194 Grade 8M Nuts?

ASTM A194 Grade 8M Nuts are high-performance, internally threaded fasteners manufactured for use in severe service conditions involving corrosion, high temperatures, and low temperatures. The ASTM A194 specification governs nuts for these types of applications, and Grade 8M is one of the most important stainless steel grades within this standard, renowned for its superior corrosion resistance.

The primary characteristic of ASTM A194 gr 8M fasteners is their material: they are manufactured from Type 316 stainless steel (UNS S31600). This austenitic stainless steel contains molybdenum, which gives it significantly superior resistance to pitting and crevice corrosion, especially in chloride-rich environments (like saltwater), compared to the standard Grade 8 (Type 304).

These nuts are available in different conditions, typically Class 1 (solution annealed) and Class 2 (strain hardened), which provides higher strength. They are most commonly supplied in a heavy hex pattern, which provides a larger bearing surface and greater strength for critical connections.

Types of ASTM A194 Grade 8M Nuts

Nuts

ASTM A194 Gr.8M Heavy Hex Nuts

Hex Nuts

ASTM A194 Gr.8M Hex Nuts

Jam Nuts

ASTM A194 Gr.8M Jam Nuts

Square Nuts

ASTM A194 Gr.8M Square Nuts

Coupling Nuts

ASTM A194 Gr.8M Coupling Nuts

Wing Nuts

ASTM A194 Gr.8M Wing Nuts

Lock Nuts

ASTM A194 Gr.8M Lock Nuts

Flange Nuts

ASTM A194 Gr.8M Flange Nuts

Cap Nuts

ASTM A194 Gr.8M Cap Nuts

Eye Nuts

ASTM A194 Gr.8M Eye 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.

Chemical Composition of ASTM A194 Gr 8M Nuts (Type 316)

Element Content (%)
Carbon (C), max 0.08
Manganese (Mn), max 2.00
Phosphorus (P), max 0.045
Sulfur (S), max 0.030
Silicon (Si), max 1.00
Chromium (Cr) 16.0 – 18.0
Nickel (Ni) 10.0 – 14.0
Molybdenum (Mo) 2.00 – 3.00

Mechanical Properties of ASTM A194 Gr 8M Nuts

Class

Condition

Size Range

Proof Load Stress

Hardness, max

1

Carbide Solution Treated

Up to 4″

80,000 psi

96 HRB / 223 HBW

2

Carbide Solution Treated & Strain Hardened

Up to 3/4″

150,000 psi

35 HRC / 327 HBW

2

Carbide Solution Treated & Strain Hardened

Over 3/4″ to 1″

135,000 psi

35 HRC / 327 HBW

2

Carbide Solution Treated & Strain Hardened

Over 1″ to 1-1/2″

125,000 psi

35 HRC / 327 HBW

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 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 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.

“Contact Jade Special Metals today with your requirement for ASTM A194 GR. 8M Nuts. We assure you of the best quote.

ASTM A194 GR. 8M Nuts Inventory

hex-nuts
ASTM A194 GR. 8M Hex Nuts
lock-nuts
ASTM A194 GR. 8M Lock Nuts
wing-nuts
ASTM A194 GR. 8M Wing Nuts

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

Marine & Coastal Applications: The molybdenum content helps to provide excellent resistance to problems caused by chloride from salt water in the form of pitting corrosion and crevice corrosion.
Chemical & Petrochemical Processing: Use in reactors, vessels. Or in piping systems where corrosive acids, chlorides and aggressive chemicals are present.
Pharmaceutical & Food Processing: Hygienic properties and excellent cleanability present in Type 316 stainless steel makes these nuts excellent for sanitary applications.
Wastewater Treatment: Resists corrosion from several chemicals and compounds used at municipal and industrial water treatment facilities.
Cryogenic Service: Still has excellent toughness and mechanical properties within low temperature applications.

Industry

Why Choose Jade Special Metals for ASTM A194 GR.8M Fasteners?

  • Specialist Manufacturer: We are an established manufacturer of A194 8M Nuts and we control the all-important solution annealing and strain hardening which makes the performance and reliability for your application.
  • Certified Quality: Each order is shipped with a Mill Test Certificate (MTC) to confirm compliance with the chemical and mechanical requirements of the ASTM A194 standard.
  • Large Inventory: We stock a large inventory of ASTM A194 Gr.8M heavy hex nuts in Class 1 and Class 2 condition for fast delivery.
  • Competitive Price: Our direct to market and well managed manufacturing processes allow us to provide to you a competitively priced option while ensuring that you have the certified quality for your application.
  • Global Exporter: With well developed logistics, we are able export UNS S31600 fasteners to customers quickly and reliably.

Get a Competitive Price for ASTM A194 Grade 8M Nuts

Contact Jade Special Metals today for a prompt and competitive quote on your ASTM A194 Grade 8M Nuts requirements. Our team of stainless steel experts is ready to assist you with material selection, class specifications, and logistics to ensure your project’s success.

We maintain ready stock of Stainless Steel ASTM A194 GR. 8M Self Locking Nut, ASTM A194 GR. 8M Heavy Hex Nuts, ASTM A194 GR. 8M Self Locking Nut, ASTM A194 GR. 8M Lock Nuts, ASTM A194 GR. 8M Hex Nuts. Get in touch with us with your requirement for quick quote.

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