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Home Product M8*40 Metric External Hex Bolts | DIN 933 Stainless Steel A2-70, ISO 4017 Hex Head Machine Screws
Metric external hexagonal bolts M8*40

M8*40 Metric External Hex Bolts | DIN 933 Stainless Steel A2-70, ISO 4017 Hex Head Machine Screws

M8x40 Hex Bolt DIN 933
External Hex Cap Screw M8-40
Metric Hex Head Bolt M8x40mm
Metric external hexagonal bolts M8*40
M8x40 Hex Bolt DIN 933, also labeled as External Hex Cap Screw M8-40, is a metric hex head bolt manufactured to DIN 933 standards with M8 thread size and 40mm length. This precision-engineered metric hex head bolt M8x40mm features a full-threaded design for robust fastening in industrial applications.
Categories:Fasteners & Fixings
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Product Description

The M8x40 Hex Bolt DIN 933 (External Hex Cap Screw M8-40) is a metric-grade threaded fastener with a hexagonal head designed for high-torque applications. This fully threaded Metric Hex Head Bolt M8x40mm complies with DIN 933 standards, featuring a 13mm hex head width, 8mm nominal diameter, 40mm length, and 1.25mm pitch. Manufactured from Grade 8.8 steel (equivalent to SAE J429 Grade 5), it offers tensile strength up to 800 MPa and a surface finish of zinc-plated or plain steel corrosion resistance. Suitable for industrial machinery, automotive assembly, and structural applications, its external hex design allows direct wrench engagement without specialized tools. Key advantages include high load-bearing capacity and compatibility with standard metric hardware, while manual tightening may require torque calibration. Operating temperature ranges from -50°C to +120°C for zinc-coated versions.
Parameter Specification
Product Model M8x40 Hex Bolt DIN 933; External Hex Cap Screw M8-40; Metric Hex Head Bolt M8x40mm
Thread Size M8 (Metric Coarse Thread)
Thread Length 40mm
Head Style External Hexagonal
Head Height 5.3mm
Hexagon Width 13mm (Across Flats)
Material Carbon Steel (Grade 8.8) / Stainless Steel (A2/A4)
Tensile Strength 800 MPa (Grade 8.8)
Surface Finish Plain, Zinc Plated, or Hot-Dip Galvanized
Thread Pitch 1.25mm (Standard ISO Coarse)
DIN Standard DIN 933
Torque Capacity 20-24 Nm (Grade 8.8 Dry)
Application General Machinery, Construction, Automotive
question:Can I arrange official courier pickup myself?
answer:Yes, customers can schedule official courier pickups. Please contact our support for detailed arrangements.
question:What is the warranty period?
answer:Products come with a 1-year warranty covering manufacturing defects. Check terms for specifics.
question:Why can other suppliers source discontinued models you can’t?
answer:Suppliers may access niche markets or old stock. We prioritize current models to ensure quality and reliability.
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 I arrange official courier pickup myself?
answer:Yes, customers can schedule official courier pickups. Please contact our support for detailed arrangements.
question:What is the warranty period?
answer:Products come with a 1-year warranty covering manufacturing defects. Check terms for specifics.
question:Why can other suppliers source discontinued models you can’t?
answer:Suppliers may access niche markets or old stock. We prioritize current models to ensure quality and reliability.
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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