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Home Product Half Thread External Hexagonal Bolt M8*55, Carbon Steel Class 8.8 for Automotive Machinery
Half thread external hexagonal bolt M8*55

Half Thread External Hexagonal Bolt M8*55, Carbon Steel Class 8.8 for Automotive Machinery

M8x55 half thread hex bolt
Partial thread external hex bolt
Half-threaded M8-55 bolt
Half thread external hexagonal bolt M8*55
M8x55 half thread hex bolt, partial thread external hex bolt with DIN/ISO standards. Half-threaded M8-55 bolt in carbon steel or stainless steel, zinc-plated or plain finish.
Categories:Fasteners & Fixings
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Product Description

The M8x55 half thread hex bolt is a Partial thread external hex bolt designed with a 55 mm overall length, featuring a threaded portion approximately 27.5 mm long and an unthreaded shank of 27.5 mm. Constructed from grade 8.8 carbon steel or stainless steel (A2/A4), it has a hexagonal head width of 13 mm and a thread pitch of 1.25 mm. Surface treatments include zinc plating or hot-dip galvanizing for corrosion resistance. With a tensile strength of 800 MPa minimum, it supports torque values up to 28 Nm. Ideal for mechanical assembly, automotive, and construction applications, the Half-threaded M8-55 bolt enables adjustable clamping distances while maintaining shear resistance in the unthreaded section. Key advantages include vibration resistance and dual-section functionality, though installation requires proper alignment tools. Operating temperature ranges from -50°C to +250°C depending on coating. Not compatible with applications requiring full thread engagement.
Parameter Specification
Model/Designation M8x55 half thread hex bolt
Thread Type Partial thread external hex bolt
Nominal Diameter 8 mm
Total Length 55 mm
Thread Length 25 mm (partial)
Head Type External hexagonal
Material Carbon steel (Grade 8.8)
Surface Finish Zinc-plated
Thread Pitch 1.25 mm (coarse)
Standard Compliance DIN 933 / ISO 4017
Tensile Strength 800 MPa
Yield Strength 640 MPa
Thread Direction Right-hand
Surface Hardness 270-340 HV
Torque Value 20-25 Nm (lubricated)
question:Can the company provide upgraded or alternative models?
answer:Yes, we offer upgraded and alternative models based on availability and client requirements.
question:Can I self-schedule official courier pickup for my order?
answer:Yes, self-scheduling courier pickup is available via our portal with valid tracking details.
question:Does the company provide technical selection support?
answer:Yes, we provide technical guidance to help select the optimal product for your needs.
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 the company provide upgraded or alternative models?
answer:Yes, we offer upgraded and alternative models based on availability and client requirements.
question:Can I self-schedule official courier pickup for my order?
answer:Yes, self-scheduling courier pickup is available via our portal with valid tracking details.
question:Does the company provide technical selection support?
answer:Yes, we provide technical guidance to help select the optimal product for your needs.
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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