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Home Product M8×40 Cylindrical Head Hexagon Socket Screws (DIN 912) A2-70 Stainless Steel, Metric Thread Fasteners for Machinery, Automotive
Cylindrical head hexagon socket screws M8*40

M8×40 Cylindrical Head Hexagon Socket Screws (DIN 912) A2-70 Stainless Steel, Metric Thread Fasteners for Machinery, Automotive

M8x40 hex socket screw
Cylindrical head socket screw
Metric hexagon socket screws
Cylindrical head hexagon socket screws M8*40
M8x40 hex socket screw with cylindrical head, metric hexagon socket screws in DIN 916 standard. Manufactured in stainless steel or alloy steel, designed for precision fastening in machinery, automotive, and industrial assemblies. Features a cylindrical head with internal hex drive for low-profile, secure installation.
Categories:Fasteners & Fixings
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Product Description

The M8x40 Hex Socket Screw with cylindrical head is a metric fastener designed for high-torque applications in machinery, automotive, and construction industries. Featuring a 6 mm internal hexagon drive compliant with ISO 4762/DIN 912 standards, this steel screw (grade 8.8) has a diameter of 8 mm and total length of 40 mm, available with zinc-plated or black oxide coating for corrosion resistance. The low-profile cylindrical head design enables space-efficient installations in constrained environments. Operating temperature ranges from -50°C to +150°C depending on surface treatment. Key advantages include precise torque transfer via Allen keys, vibration resistance through full-thread engagement, and durability in harsh conditions. Potential limitations include restricted access for tools in deep recesses and reduced grip strength if the hex socket becomes worn. Widely used in engine components, structural frameworks, and heavy equipment assemblies requiring secure fastening under dynamic loads.
Parameter Specification
Product Model Cylindrical head hexagon socket screws M8x40
Thread Size M8 x 40 mm
Head Type Cylindrical Head
Drive Type Hex Socket (ISO 4762)
Material Steel (Grade 8.8)
Surface Finish Zinc Plated
Socket Size 6.0 mm
Thread Pitch 1.25 mm
Standards DIN 912 / ISO 4762
Tensile Strength 800 MPa
Hardness 22-32 HRC
Thread Length Full Thread
Application Metric hexagon socket screws for machinery and construction
question:Does your company have a professional product selection engineering team?
answer:Yes, our team of expert engineers specializes in market analysis and product optimization.
question:Can your company provide upgraded or alternative product models?
answer:Yes, we offer upgraded models and alternative options tailored to your requirements.
question:How does your company handle refurbished products that malfunction under warranty?
answer:We replace or refund any refurbished product under warranty and improve quality checks.
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:Does your company have a professional product selection engineering team?
answer:Yes, our team of expert engineers specializes in market analysis and product optimization.
question:Can your company provide upgraded or alternative product models?
answer:Yes, we offer upgraded models and alternative options tailored to your requirements.
question:How does your company handle refurbished products that malfunction under warranty?
answer:We replace or refund any refurbished product under warranty and improve quality checks.
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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