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Home Product M8x40 Half Thread External Hex Bolt DIN 933, Stainless Steel, Zinc Plated, Automotive Fasteners
Half thread external hexagonal bolt M8*40

M8x40 Half Thread External Hex Bolt DIN 933, Stainless Steel, Zinc Plated, Automotive Fasteners

M8x40 hex bolt
Half thread hex bolt
External hexagonal half threaded bolt
Half thread external hexagonal bolt M8*40
M8x40 half thread hex bolt with external hexagonal head. Partial-thread design for versatile fastening applications. External hexagonal half threaded bolt featuring durable construction and corrosion resistance. Ideal for mechanical assemblies requiring adjustable grip length.
Categories:Fasteners & Fixings
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Product Description

The M8x40 hex bolt is an externally threaded fastener with a half-thread design, featuring an external hexagonal head for tool engagement. Specifically designed as an External hexagonal half-threaded bolt, it offers a total length of 40mm with a partially threaded shank (typically 20-25mm threaded section), leaving a smooth shoulder for precise alignment in applications. Constructed from grade 8.8 carbon steel or A2/A4 stainless steel, it supports working temperatures from -50°C to +250°C and torque values up to 24Nm. This Half-thread hex bolt complies with DIN 933/ISO 4016 standards, featuring a 13mm hexagonal head width and zinc-plated or Dacromet-coated surface for corrosion resistance. Primarily used in mechanical assembly, automotive frameworks, and structural connections, its partial threading provides vibration resistance while reducing material contact stress. Limitations include reduced grip length compared to full-thread counterparts and potential thread galling in high-torque aluminum applications.
Parameter Specification
Product Type Half Thread External Hexagonal Bolt
Nominal Diameter M8
Total Length 40 mm
Thread Length 20 mm (Partial Thread)
Head Type External Hexagonal (Hex Head)
Material Grade Carbon Steel (Grade 8.8)
Surface Finish Zinc Plated (Electroplated)
Thread Pitch 1.25 mm (Coarse Thread)
Standards Compliance ISO 4014 / DIN 933
Hexagon Head Width 13 mm
Threaded Section Half Thread (Non-Threaded Shank)
Mechanical Property Minimum Tensile Strength: 800 MPa
question:Why is there a handling fee?
answer:The handling fee covers transaction processing costs to ensure secure and efficient payment handling.
question:What shipping methods do you offer?
answer:We support DHL, Fedex, UPS, and other major carriers for reliable global delivery.
question:How long does order processing take?
answer:Orders are processed within 1-3 business days after payment confirmation.
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:Why is there a handling fee?
answer:The handling fee covers transaction processing costs to ensure secure and efficient payment handling.
question:What shipping methods do you offer?
answer:We support DHL, Fedex, UPS, and other major carriers for reliable global delivery.
question:How long does order processing take?
answer:Orders are processed within 1-3 business days after payment confirmation.
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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