Stainless Steel 316 Hex Nut

About Stainless Steel 316 Hex Nut

The Stainless Steel 316 Hex Nut is a premium, marine-grade internal thread fastener engineered for maximum corrosion resistance in highly aggressive environments. Forged from grade 316 austenitic stainless steel, it is enriched with 2% to 3% Molybdenum, which significantly elevates its resistance to pitting, crevice corrosion, and chemical attacks compared to standard 304 stainless steel. Featuring a traditional six-sided profile, this nut pairs with matching bolts or studs to provide ultra-reliable structural clamping under the most punishing industrial conditions.

Key Features & Design

• Advanced Corrosion Protection: Specifically designed to withstand continuous exposure to sodium chloride (saltwater), industrial acids, sulphurous solutions, and halogen elements.

• Six-Sided Driving Geometry: Flat sides provide a broad surface area for secure wrenching, ensuring high torque application without rounding or slippage.

• High Creep Resistance: The addition of molybdenum improves elevated-temperature mechanical properties, allowing the nut to maintain structural hold at higher operating temperatures.

• Non-Magnetic Properties: Retains an almost entirely non-magnetic structure, making it ideal for precision electronics, scientific instruments, and medical imagery facilities.

Manufacturing & Dimensional Standards

Depending on your regional engineering blueprints, 316 hex nuts are precision-machined to match distinct metric or imperial parameters:

• Metric Standards:

• DIN 934 / ISO 4032: Standard hex nuts (ISO 4032 outlines updated width profiles for sizes like M10, M12, and M14).

• DIN 985: Nylon insert lock nut variant designed to resist loosening under severe vibrations.

• Imperial (Inch) Standards:

• ASME B18.2.2: Covers Finished Hex Nuts, Jam Nuts (thin profile), and Heavy Hex Nuts (thick profile with an expanded bearing surface).

• Thread Classification: Available in Unified National Coarse (UNC) or Fine (UNF) thread configurations under a Class 2B fit tolerance.

Mechanical Properties & Materials

• Material Classification: Commonly marked as A4-70 (metric) or ASTM F594 Group 2 (imperial).

• Tensile & Yield Capabilities: Yields a high minimum tensile strength of 700 MPa (Class 70), ensuring excellent structural reliability before threat of thread stripping.

• A4-80 High-Tensile Option: Available in an advanced strain-hardened class offering a boosted tensile rating of 800 MPa for critical high-pressure tasks.

Target Applications & Industries

• Marine & Offshore Engineering: Securing ship hulls, underwater rig mechanisms, dock installations, and seaside desalination plants.

• Chemical, Oil, & Gas Processing: Joining high-pressure pipelines, chemical mixing vats, heat exchangers, and refinery machinery handling corrosive liquids.

• Pharmaceutical & Medical Manufacturing: Assembling cleanroom appliances, sanitary storage vessels, and surgical production equipment requiring deep chemical sanitization.

• Wastewater Treatment: Fastening industrial pumps, aeration grids, and sewer filtration structures exposed to harsh biological fluids and chemical additives.