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DIN 931 Hex Head Bolts – Half Threaded Metric Bolts
DIN 931 Hex Head Bolts are precision-engineered fasteners featuring a hexagonal head and partially threaded shank, designed for use in high-strength mechanical and structural applications. These bolts are commonly used in automotive, machinery, construction, and industrial assemblies where secure clamping with high tensile strength is essential.
Manufactured to DIN 931 specifications, these bolts ensure dimensional accuracy, excellent load capacity, and easy wrenching access due to the standard hexagonal head design.
Overview of DIN 931 Hex Head Bolts
DIN931 Technical Specifications
DIN 931 Available Materials & Finishes
DIN 931 Equivalent Standards – ISO, BS, IS, JIS
Applications of DIN 931 Bolts
All dimensions are as per DIN 931 standards
Reference with DIN 931 , ISO, and ASME
Standard DIN 931
Thread Type Metric (Coarse), Partial Thread
Head Type Hexagonal
Drive Type External Hex
Thread Coverage Partial thread (typically 2/3 of shank length)
Available Sizes M6 to M48
Length Range 20mm to 300mm (custom lengths on request)
Tensile Strength Grades 4.6, 5.6, 8.8, 10.9, 12.9
Thread Tolerance 6g (as per ISO 965-1)
Standards Compliance ISO 4014 (Equivalent), BS 4190, IS 1363
Temperature Resistance Up to 300°C (material-dependent)
Coatings Available Zinc Plated, Black Oxide, Hot-Dip Galvanized, Dacromet
Materials Mild Steel, Alloy Steel, Stainless Steel (A2/A4), Brass
DIN 931 bolts are available in a variety of materials to meet the demands of different industrial and environmental conditions:
Mild Steel (Grade 4.6 / 5.6) – For general-purpose fastening
High Tensile Steel (Grade 8.8 / 10.9 / 12.9) – Ideal for high-stress mechanical applications
Stainless Steel A2 (304) – Corrosion-resistant for general outdoor and chemical environments
Stainless Steel A4 (316) – Superior corrosion resistance for marine and acidic environments
Brass – Used in non-magnetic and decorative applications
Alloy Steel – Heat-treated for extreme strength and performance
DIN 931 - ISO 4014
DIN 931 Hex Head Bolts are high-performance fasteners with a hexagonal head and partially threaded shank, designed according to the German DIN standard. These bolts are widely used in mechanical, structural, and automotive assemblies that require strong, secure fastening with easy installation using standard wrenches or spanners.
Thanks to their partially threaded design, DIN 931 bolts provide excellent shear strength and alignment, making them ideal for load-bearing applications. They are available in a variety of materials, finishes, and strength grades, suitable for use in both indoor and outdoor environments.
At Ravina Fasteners, we manufacture DIN 931 bolts in metric sizes from M6 to M48, delivering consistent quality for industrial, commercial, and export markets
DIN 931 Hex Head Bolts are used across a wide range of industrial, structural, and mechanical applications due to their high strength, precision, and ease of installation. Their partially threaded design provides excellent load distribution and alignment.
Note: All dimensions and tolerances are strictly as per DIN 931 standards to ensure compatibility, reliability, and global interchangeability.