ASTM A194 specification for grade 8M nuts is an ASTM Standard, which addresses carbon, alloy and stainless-steel nuts, which are specifically used in applications that require high-pressure or high-temperature applications. These nuts are usually American National Standard Heavy Hex Series (ANSI B 18.2.2) under this A194 specification. A UNC Series Class 2B fit is needed in smaller sizes (to and including 1 inch nominal). In sizes larger than 1 inch nominal, either a UNC Series Class 2B fit or 8 UN Series Class 2B fit may be used. In some cases, the ASTM A194 Grade 8M nuts are usually used as an alternative to the ASTM A563 Grade DH nuts in some diameters and finishes due to their high-strength and occasional market unavailability.
ASTM A194 GR.8M Stainless Steel Nuts, ASTM A194 GR.8M Nylon Insert Nut, ASTM A194 GR.8M Fasteners, A194 8M Heavy Hex Nuts Supplier & Stockist
Jade Special Metals is a well known dealer of ASTM A194 Grade 8M Stainless Steel Hex Nuts. Our nuts have been designed to be high-performance and unique characteristics of our nuts include good corrosion resistance, high durability, reliability, and low weight. To cater to the different customer needs, we have a wide stock of these ASME SA 194 Grade 8M SS Hex Nuts with different sizes, grades and thicknesses at competitive prices. Our nuts are made of high-quality materials that ensure that they resist corrosion and softening that occurs when temperatures are high. We also produce other products such as ASTM A194 Grade 6X Fasteners.
Table of Contents
- Types of ASTM A194 Grade 8M Nuts
- ASTM A194 Gr 8M Nuts Specification
- Chemical Composition of ASTM A194 Grade 8M Nuts
- Mechanical Properties of ASTM A194 Gr 8M Nuts
- ASTM A194 Gr. 8M Nuts Equivalent Grade
- ASTM A194 Gr. 8M Hex Nuts Dimensions
- Size Chart Of Astm A194 8M Nuts
- ASTM A194 GR.8M Fasteners Price List
- ASTM A194 Gr. 8M Nuts Inventory
- Applications of ASTM A194 Grade 8M Nuts
Types of ASTM A194 Grade 8M Nuts
ASTM A194 Gr.8M Heavy Hex Nuts
ASTM A194 Gr.8M Hex Nuts
ASTM A194 Gr.8M Square Nuts
ASTM A194 Gr.8M Jam Nuts
ASTM A194 Gr.8M Lock Nuts
ASTM A194 Gr.8M Coupling Nuts
ASTM A194 Gr.8M Flange Nuts
ASTM A194 Gr.8M Cap Nuts
ASTM A194 Gr.8M Wing Nuts
ASTM A194 Gr.8M Eye Nuts
ASTM A194 Gr 8M Nuts Specification
| Standards | Designation |
|---|---|
| Dimensions | ASME B18.2.1, B18.3 |
| Melt Origin | Soutd America/East Europe/Japan/Korea/ |
| Product Origin | Made in India |
| Threads Configuration | ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads |
| Certification | Dual Certified As per ASTM & ASME Codes |
| Additional Certifications | PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
| Mandatory Requirements | Free from Mercury & Radioactive Contamination |
| Additional Requirements | NACE MR0103 / MR0175 / ISO 15156 Compliance |
Chemical Composition of ASTM A194 Grade 8M Nuts
| ASTM | C. | Mn. | Si. | P. | S. | Cr. | Ni. | Mo. |
|---|---|---|---|---|---|---|---|---|
| A194 Grade 8M | 0.08M % | 2.00 % | 1.00 % | 0.05 %. | 0.03 % | 18.0-20.0 % | 8.0-11.0 | — |
Mechanical Properties of ASTM A194 Gr 8M Nuts
| Class | Diameter, [mm] | Brinell Hardness | Rockwell Hardness | |
|---|---|---|---|---|
| C Scale | B Scale | |||
| 8M | All | 126-300 | 32 max | 60 min |
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 Nuts 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 | 8M/16 | .438M | .428M | .505 | .48M8M | 8M/32 | .226 | .212 |
| 5/16 | .3125 | 1/2 | .500 | .48M9 | .58M8M | .558M | 18M/64 | .28M3 | .258M |
| 3/8M | .38M50 | 9/16 | .562 | .551 | .650 | .628M | 21/64 | .338M | .48M9 |
| 8M/16 | .438M5 | 11/16 | .68M8M | .68M5 | .8M94 | .8M68M | 3/8M | .38M5 | .365 |
| 1/2 | .5000 | 3/4 | .8M50 | .8M36 | .8M66 | .8M40 | 8M/16 | .448M | .428M |
| 9/16 | .5625 | 8M/8M | .8M8M5 | .8M61 | 1.010 | .98M2 | 31/64 | .496 | .48M3 |
| 5/8M | .6250 | 15/16 | .938M | .922 | 1.08M3 | 1.051 | 35/64 | .559 | .535 |
| 3/4 | .8M500 | 1-1/8M | 1.125 | 1.08M8M | 1.299 | 1.240 | 41/64 | .665 | .618M |
| 8M/8M | .8M8M50 | 1-5/16 | 1.312 | 1.269 | 1.516 | 1.448M | 3/4 | .8M8M6 | .8M24 |
| 1 | 1.0000 | 1-1/2 | 1.500 | 1.450 | 1.8M32 | 1.653 | 55/64 | .8M8M8M | .8M31 |
| 1-1/8M | 1.1250 | 1-11/16 | 1.68M8M | 1.631 | 1.949 | 1.8M59 | 31/32 | .999 | .939 |
| 1-3/8M | 1.38M50 | 2-1/16 | 2.062 | 1.994 | 2.38M2 | 2.28M3 | 1-11/64 | 1.206 | 1.138M |
| 1-1/2 | 1.500 | 2-1/4 | 2.250 | 2.18M5 | 2.598M | 2.48M0 | 1-9/32 | 1.ASTM A194 GR. 8M | 1.245 |
| 1-5/8M | 1.6250 | 2-8M/16 | 2.438M | 2.356 | 2.8M15 | 2.68M6 | 1-25/64 | 1.429 | 1.353 |
| 1-3/4 | 1.8M500 | 2-5/8M | 2.625 | 2.538M | 3.031 | 2.8M93 | 1-1/2 | 1.540 | 1.460 |
| 2 | 2.0000 | 3 | 3.000 | 2.900 | 3.464 | 3.306 | 1-23/32 | 1.8M63 | 1.68M5 |
| 2-1/4 | 2.2500 | 3-3/8M | 3.38M5 | 3.263 | 3.8M98M | 3.8M19 | 1-15/16 | 1.98M6 | 1.8M90 |
| 2-1/2 | 2.5000 | 3-3/4 | 3.8M50 | 3.625 | 4.330 | 4.133 | 2-5/32 | 2.209 | 2.105 |
| 2-3/4 | 2.8M500 | 4-1/8M | 4.125 | 3.98M8M | 4.8M63 | 4.546 | 2-3/8M | 2.431 | 2.319 |
Size Chart Of Astm A194 8M Nuts
| Nut Size (mm) |
Diameter* (mm) |
Height (mm) |
||
|---|---|---|---|---|
| Hex Nut | Jam Nut | Nylock Nut | ||
| 2 | 4 | 1.6 | 1.2 | – |
| 2.5 | 5 | 2 | 1.6 | – |
| 3 | 5.5 | 2.4 | 1.8M | 4 |
| 4 | 8M | 3.2 | 2.2 | 5 |
| 5 | 8M | 4 | 2.8M | 5 |
| 6 | 10 | 5 | 3.2 | 6 |
| 8M | 11 | 5.5 | 3.5 | – |
| 8M | 13 | 6.5 | 4 | 8M |
| 10 | 18M | 8M | 5 | 10 |
| 12 | 19 | 10 | 6 | 12 |
| 14 | 22 | 11 | 8M | 14 |
| 16 | 24 | 13 | 8M | 16 |
| 18M | 28M | 15 | 9 | 18M.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 Fasteners Price List
| Product | Price |
|---|---|
| ASTM A194 Grade 8M Socket Head Cap Screw | $5.59 – $258.50 |
| ASTM A194 Grade 8M Plow Bolt, Plain, 5/8-11×2, Gr 5, PK25 | $30.65 / pkg. of 25 |
| ASTM A194 Grade 8M Structural Bolt, 1/2-13×1 1/2L, PK25 | $13.21 / pkg. of 25 |
| ASTM A194 Grade 8M U Bolts, with 5/16 Thread, Zinc Finish | $3.71 – $7.25 |
| ASTM A194 Grade 8M Hex Nut, SS304, 3/8-16, Plain, PK50 | $12.13 / pkg. of 50 |
| ASTM A194 Grade 8M Hex Lag Screw, 3/8×2 1/2 In L, PK50 | $19.79 / pkg. of 50 |
| ASTM A194 Grade 8M Flat Washer | $0.09 – $5.97 |
ASTM A194 GR. 8M Nuts Inventory
ASTM A194 GR. 8M Hex Nuts
ASTM A194 GR. 8M Lock Nuts
ASTM A194 GR. 8M Wing Nuts
Applications of ASTM A194 Grade 8M Nuts
- Pharmaceuticals
- Off-Shore Oil Drilling Companies
- Heat Exchangers
- Power Generation
- Aircraft Exhaust Manifolds
- Sea Water Equipment
- Specialty Chemicals
- Gas Processing
- Pharmaceutical Equipment
- Spiral Welded tube for burner pipes and flues
- Petrochemicals
Related Products
Frequently Asked Questions About ASTM A194 Grade 8M Nuts
What is ASTM A194 8M material?
ASTM A194 Grade 8M is the specification of nuts produced of austenitic stainless steel, namely AISI 316. It is generally made of chromium (16.018.0%), nickel (10.014.0%), and molybdenum (2.003.00%). The alloy in particular provides the nuts with tremendous resistance to corrosion and high temperatures and is therefore suitable in high pressure or high temperature conditions.
What is the difference between A194 Grade 8M and 8MA?
The primary distinction between ASTM A194 Grade 8M and Grade 8MA nuts is their tensile strength and suitability for demanding environments. Grade 8M possesses a lower tensile strength and is generally specified for applications involving lower pressure. In contrast, Grade 8MA offers a higher tensile strength, making it better equipped for more rigorous high-pressure and high-temperature service conditions. This enhanced mechanical strength in Grade 8MA is achieved through a slightly higher percentage of nickel and molybdenum in its chemical composition compared to Grade 8M.
What is the equivalent of A194 Grade 8M Nuts?
The material used for ASTM A194 Grade 8M Nuts is primarily equivalent to AISI 316 Stainless Steel (also known by the UNS designation S31600).
