Complete range of industrial fasteners — hex bolts, socket head screws, threaded rods, anchors, washers, and specialty hardware in Grade 8.8 / 10.9 / 12.9 and stainless A2-70 / A4-80. DIN, ISO, ANSI, and JIS standards for heavy equipment, structural, and automotive assemblies.
Industrial fasteners — screws, nuts, washers, studs, anchors, and rivets — are the load-bearing components that hold machinery, structures, and vehicles together. Often called the "rice of industry," they determine the safety, service life, and reliability of every assembly. This guide covers fastener types, ISO/SAE/ASTM strength grades, materials, coatings, and application selection to help you specify the right fastener for any high-load program.
An industrial fastener is a standardized mechanical component used to join two or more parts through a removable threaded or permanent non-threaded connection. Unlike welding or adhesives, fasteners allow the joint to be disassembled for service, repair, or replacement — critical for heavy equipment, automotive, and structural applications. The four key engineering properties of any fastener are tensile strength, yield strength, corrosion resistance, and fatigue life, determined by material, heat treatment, and thread-rolling process.
Dafluid supplies the full industrial fastener portfolio — from M3 micro-screws to M64 heavy hex structural bolts — in carbon steel (Grade 4.6 to 12.9), alloy steel (A193 B7 / B16), stainless steel (A2-70 / A4-80), brass, and titanium, conforming to the standards of DIN, ISO, ANSI/ASME, JIS, BS and GB with full traceability under the ISO 9001 and IATF 16949 quality systems.
Our catalog covers every fastener category used across heavy industry, construction, automotive, and energy:
DIN 933 / DIN 931 / ISO 4014 / ISO 4017 / ASTM A325 / A490. Partially and fully threaded hex head bolts for structural steel, machinery, and bridges. M6–M64.
DIN 912 / ISO 4762 / ASME B18.3. High-tensile Allen bolts up to Class 12.9. Ideal for hydraulic manifolds, engine assemblies, and tight-clearance machinery.
Studs DIN 975 / DIN 976, fully threaded rods, hex nuts (DIN 934), lock nuts (DIN 985 nylon-insert), flange nuts (DIN 6921). For flanges, engines, and tension assemblies.
Wedge anchors, sleeve anchors, chemical anchors, L-bolts, J-bolts, U-bolts, and foundation bolts. For concrete fastening, structural steel base plates, and sign / tower mounting.
Flat DIN 125 / spring DIN 127 / fender DIN 9021 / conical DIN 6796 / Nord-Lock wedge-lock pairs. Distribute load, prevent loosening, and protect mating surfaces.
A2-70 (304) / A4-80 (316) / B8 / B8M / B16 / Titanium Grade 2 & 5. For marine, chemical, food-grade, subsea, and cryogenic applications where corrosion is mission-critical.
Dafluid fasteners are qualified and in service across every load-bearing application worldwide:
Match strength class, material, and coating to your load, environment, and standards:
| Grade / Class | Tensile / Yield (min) | Standard & Material | Typical Application |
|---|---|---|---|
| Grade 8.8 (Metric) / SAE J429 Gr.5 | 800 / 640 MPa | ISO 898-1; medium-carbon steel, Q&T | General machinery, structural steel, agricultural |
| Grade 10.9 (Metric) / SAE J429 Gr.8 | 1,000 / 900 MPa | ISO 898-1; alloy steel 40Cr / SCM435, Q&T | Automotive chassis, heavy equipment, powertrain |
| Grade 12.9 (Metric) | 1,200 / 1,080 MPa | ISO 898-1; alloy steel SCM435 / 42CrMo, Q&T | Mining, wind turbines, presses, racing |
| A2-70 Stainless | 700 / 450 MPa | ISO 3506-1; 304 austenitic stainless | Food, pharma, general chemical, ≤500 ppm Cl⁻ |
| A4-80 Stainless | 800 / 600 MPa | ISO 3506-1; 316 / 316L austenitic stainless | Marine, offshore, chemical, ≤2,000 ppm Cl⁻ |
Need help specifying the right fastener for your load, environment, and standard? Contact our fastener engineering team with your application, torque requirement, and target grade — we'll return matched SKUs, dimensional drawings, and a formal quotation within 24 hours.
