Both of these patterns will be standard as a heavy hex nut, meaning that it will require a larger wrench than a standard “finished” pattern nut. Most importantly, we have case hardened / strain hardened nuts too!

Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or both. ASTM A194 specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range 1/4 through 4 in. …

Hardness numbers are Brinell Hardness. Nuts that are carbide-solution treated require additional letter A - 8A or 8MA. All nuts shall bear the manufacturer’s identification mark. Nuts shall be legibly marked on one face to indicate the grade and process of the manufacturer.

Choose from our selection of grade 8M nuts, including hex nuts, locknuts, and more. Same and Next Day Delivery.

The SA 194 Gr 8M Nut gets the strength, corrosion resistance and the hardness from this material composition. The minimum tensile strength is 550MPa, the minimum yield strength is 240MPa and the elongation is 30% for the ASTM A194 Grade 8m Class 2 Nuts and the class 1 nuts.

Hexagon full nut to ASME B18.2.2 and B18.6.3. Typically fitted with a spanner or ratchet with socket. The most popular nut type, and used for decades on all types of assembly throughout the world.

Lightning Bolt has one of North America’s largest inventories of A194 Grade 8M Nuts. This pattern is commonly found as a heavy hex nut. The A194 Grade 8M nut is essentially very similar, however the standards call for these to made from an 316 type of stainless steel.

A194 Gr8M U-nuts provide better clamping force and prevent any axial movement in the system. These nuts create sufficient friction amongst threads to prevent unscrewing. The A194 Gr 8Ma Wing Nuts have good mechanical properties and can be heat treated.

BHEL approved ASTM A194 Grade 8M Nuts Manufacturers, leading Supplier of ASME SA 194 Grade 8M Washer. Get price list of A194 Grade 8m Class 2 Nuts, Grade 8M Strain Hardened Nuts in Mumbai, India.

Grade 8M stainless steel heavy hex nuts are intended for use in high-pressure and/or high-temperature service with ASTM A193 and A320 bolting of similar material, such as B8M and B8M Class 2. Heavy hex nuts provide increased bearing surface area over finished nuts.