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Home Product M20*75 Half Thread External Hex Bolt High-Strength Steel Galvanized Structural Fastener Construction Machinery
Half thread external hexagonal bolt M20*75

M20*75 Half Thread External Hex Bolt High-Strength Steel Galvanized Structural Fastener Construction Machinery

M20x75 half thread bolt
External hex bolt M20x75
DIN 931 hex head bolt
Half thread external hexagonal bolt M20*75
M20x75 half thread bolt with external hex head, designed to DIN 931 standard. This partially threaded external hex bolt M20x75 features a hexagon head for standard wrench tightening. DIN 931 hex head bolt combines threaded and unthreaded shank sections, suitable for structural and mechanical applications requiring precise clamping.
Categories:Fasteners & Fixings
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Product Description

The M20x75 half thread bolt, also known as an External hex bolt M20x75 or DIN 931 hex head bolt, features a 20mm nominal diameter and 75mm shank length with partial threading for versatile clamping applications. This carbon steel fastener complies with DIN 931 standards, offering a hexagonal head for wrench engagement (32mm across flats) and a 2.5mm pitch coarse thread. It demonstrates a tensile strength rating of 8.8 (800 MPa), suitable for industrial machinery, structural assemblies, and automotive components. The zinc-plated surface provides corrosion resistance in standard environments (-30°C to +120°C operating range). Key advantages include precise load distribution through the half-thread design and compatibility with ISO metric components, though proper torque control is required to prevent over-tightening. The unthreaded shank section enhances shear resistance in dynamic load scenarios.
Parameter Specification
Product Designation M20x75 Half Thread External Hex Bolt
Thread Size M20 Metric Coarse Thread
Overall Length 75 mm
Thread Length Approx. 50% of shank length
Standard Compliance DIN 931 Hex Head Bolt Specification
Head Type External Hexagon (External Hex Bolt)
Material Grade Class 8.8 Carbon Steel
Surface Finish Zinc Plated (Optional)
Drive Size 30 mm Hex Key
Thread Pitch 2.5 mm Standard Pitch
Stress Area 245 mm²
Proof Load 830 MPa (Class 8.8)
question:Can the company provide upgraded or alternative models?
answer:Yes, we offer upgraded or alternative models based on product availability and customer requirements.
question:What is the warranty policy?
answer:Warranty covers defects in materials and workmanship for 12 months from delivery.
question:Can the company ensure stable supply and delivery?
answer:Yes, we maintain robust production capacity, inventory management, and efficient logistics for reliable supply.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
question:Can the company provide upgraded or alternative models?
answer:Yes, we offer upgraded or alternative models based on product availability and customer requirements.
question:What is the warranty policy?
answer:Warranty covers defects in materials and workmanship for 12 months from delivery.
question:Can the company ensure stable supply and delivery?
answer:Yes, we maintain robust production capacity, inventory management, and efficient logistics for reliable supply.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
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