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Home Product M10×40 Half Thread External Hex Bolt DIN 931 Grade 8.8 Steel Automotive Construction Fastener
Half thread external hexagonal bolt M10*40

M10×40 Half Thread External Hex Bolt DIN 931 Grade 8.8 Steel Automotive Construction Fastener

M10x40 half thread bolt
External hex head bolt M10x40
Partial thread external hex screw
Half thread external hexagonal bolt M10*40
External hex head bolt M10x40, partial thread external hex screw, also termed M10x40 half thread bolt. High-strength steel construction with zinc-plated anti-corrosion finish. DIN 931 compliant. Designed for applications requiring half-threaded fasteners with external hex drive, suitable for machinery, automotive, and structural assemblies.
Categories:Fasteners & Fixings
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Product Description

The M10x40 half thread bolt is an externally threaded fastener featuring a partial thread design with a standard external hex head for tool engagement. Designed as an M10x40 external hex head bolt, it combines a 10mm nominal diameter and 40mm total shank length, offering a threaded portion spanning approximately 50% of the shank (20mm) to optimize load distribution and clamping force. Typically constructed from grade 8.8 carbon steel or A2/A4 stainless steel, it supports tensile loads up to 800 MPa and operates within -50°C to +250°C environments. Its external hex head enables 17mm wrench compatibility, ensuring high torque transfer up to 58 Nm. The partial thread external hex screw configuration allows precise joint adjustment, reducing thread wear in non-clamping zones. Widely used in machinery assembly, structural frameworks, and automotive applications, this bolt excels in vibration-resistant installations but may require supplementary locking mechanisms in high-shock scenarios. Compliant with DIN 933/ISO 4017 standards, it includes optional zinc plating or hot-dip galvanizing for corrosion resistance.
Parameter Specification
Model Number M10x40-HT-EHB
Description M10x40 half thread bolt
External hex head bolt M10x40
Partial thread external hex screw
Thread Diameter M10
Total Length 40 mm
Thread Length 20 mm
Thread Type ISO metric half thread
Head Type External hexagonal
Head Width 17 mm (Across Flats)
Material Grade Class 8.8 Carbon Steel/A2-70 Stainless Steel
Surface Treatment Zinc Plated/Plain/HDG
Thread Pitch 1.5 mm
Standards Compliance ISO 4014, DIN 933, ASTM A325M
Drive Type Hex Key/Hex Wrench
Proof Load 800 MPa (Class 8.8)
Thread Engagement Partial (50% of total length)
question:Do you provide technical consultation for solution selection?
answer:Yes, we provide technical consultation and expert guidance to help clients choose optimal solutions.
question:Do you accept payment after delivery?
answer:No, we require advance payment or secure payment terms prior to shipment for all orders.
question:Can your company ensure stable supply?
answer:Yes, we maintain robust logistics partnerships and inventory management for reliable supply continuity.
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:Do you provide technical consultation for solution selection?
answer:Yes, we provide technical consultation and expert guidance to help clients choose optimal solutions.
question:Do you accept payment after delivery?
answer:No, we require advance payment or secure payment terms prior to shipment for all orders.
question:Can your company ensure stable supply?
answer:Yes, we maintain robust logistics partnerships and inventory management for reliable supply continuity.
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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