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Home Product M8*140 Half-Thread Hex Bolt High Strength Zinc Plated for Automotive, Construction, Machinery
Half thread external hexagonal bolt M8*140

M8*140 Half-Thread Hex Bolt High Strength Zinc Plated for Automotive, Construction, Machinery

half thread hex bolt M8x140
external hex head bolt M8 140mm
M8-140 partially threaded hex bolt
Half thread external hexagonal bolt M8*140
Half Thread Hex Bolt M8x140, external hex head bolt M8 140mm, M8-140 partially threaded hex bolt with durable external hexagonal head for secure fastening applications. Precision-engineered threading on half-length and unthreaded shank.
Categories:Fasteners & Fixings
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Product Description

The half thread hex bolt M8x140 is an external hex head fastener with a total length of 140mm, featuring a partially threaded shank (thread length typically 40-60mm) and an M8 nominal diameter. Designed for applications requiring combined clamping and alignment, this M8-140 partially threaded hex bolt has an external hexagonal head compatible with 13mm wrenches. Manufactured from grade 8.8 carbon steel or A2/A4 stainless steel, it offers tensile strengths up to 800 MPa (steel variants) with optional zinc plating or hot-dip galvanization for corrosion resistance. The hybrid threading enables secure fastening while allowing unthreaded shaft sections for precise component positioning. Commonly used in machinery assembly, structural frameworks, and automotive subsystems, it operates effectively in environments ranging from -50°C to +150°C. While the external hex design provides high torque transmission, the partial threading limits adjustable engagement depth compared to fully threaded alternatives. Typical applications include bearing mounts, bracket installations, and equipment requiring vibration-resistant joints.
Parameter Specification
Product Designation Half thread hex bolt M8x140
External hex head bolt M8 140mm
M8-140 partially threaded hex bolt
Material Carbon Steel (Grade 8.8)
Coating Zinc-plated (ISO 4042)
Standard DIN 933 / ISO 4018
Diameter M8 (8mm)
Length 140mm
Thread Length 70mm (50% of total length)
Head Height 5.3mm
Head Style External Hexagon
Thread Type Metric coarse (1.25mm pitch)
Proof Load 800 MPa
Torque Value 40 N·m
Weight 25g ±0.5g
question:How does after-sales service handle refurbished products found faulty during use?
answer:We offer free replacement for confirmed refurbished products under warranty. Contact support for immediate assistance.
question:Do you accept payment after delivery?
answer:No, we require full payment before shipment for security purposes.
question:Can shipments be declared as low value for customs?
answer:Low-value declaration is subject to destination country regulations. Additional verification may be required.
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:How does after-sales service handle refurbished products found faulty during use?
answer:We offer free replacement for confirmed refurbished products under warranty. Contact support for immediate assistance.
question:Do you accept payment after delivery?
answer:No, we require full payment before shipment for security purposes.
question:Can shipments be declared as low value for customs?
answer:Low-value declaration is subject to destination country regulations. Additional verification may be required.
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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