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Home Product M5*55 Metric External Hex Bolts, DIN 933, Class 8.8, Zinc Plated, High Strength
Metric external hexagonal bolts M5*55

M5*55 Metric External Hex Bolts, DIN 933, Class 8.8, Zinc Plated, High Strength

M5x55 hex bolts
metric hex cap screws
external hex head bolts M5
Metric external hexagonal bolts M5*55
High-quality M5x55 hex bolts, metric hex cap screws, and external hex head bolts M5. Made of durable carbon steel, zinc-plated for corrosion resistance. Compliant with ISO standards. Suitable for machinery, automotive, and industrial assembly applications.
Categories:Fasteners & Fixings
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Product Description

The M5x55 hex bolts, recognized as metric hex cap screws or external hex head bolts M5, are threaded fasteners with a 5mm nominal diameter and 55mm shank length, featuring a standard hexagonal head compatible with 8mm wrenches. Typically manufactured in grade 8.8 steel or A2/A4 stainless steel, these bolts operate in temperature ranges from -50°C to 300°C depending on material, and are commonly used in machinery, automotive assemblies, and structural applications requiring high tensile strength (up to 800 MPa for steel variants). Their external hex design ensures secure torque application and compatibility with automated tools, though the extended 55mm length may require precise clearance in confined spaces. These screws comply with ISO 4014/DIN 933 standards, offering corrosion resistance and durability in harsh environments, though stainless steel versions may exhibit lower shear strength compared to alloy steel counterparts. Ideal for heavy-duty fastening, their primary limitation lies in head protrusion height relative to low-profile alternatives.
Parameter Specification
Thread Size M5x55
Thread Pitch 0.8 mm
Head Type External Hexagon
Material Carbon Steel
Strength Grade Class 8.8
Surface Finish Zinc Plated
Standards DIN 933 / ISO 4017
Head Width 8 mm (Across Flats)
Head Height 5 mm
Drive Size 8 mm Hex Key
Torque Value 6.1 Nm (Dry)
question:Can you provide shipping photos and purchase dates for similar products?
answer:Yes, we can share relevant product photos and purchase details upon request. Contact us for specific information.
question:Does your company have a professional product selection engineering team?
answer:Yes, our team includes experienced engineers specializing in market analysis and product selection to meet diverse needs.
question:Why can other suppliers source discontinued models you can’t?
answer:Suppliers may use unauthorized channels or existing stock. We focus on current products to ensure quality and compliance.
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 you provide shipping photos and purchase dates for similar products?
answer:Yes, we can share relevant product photos and purchase details upon request. Contact us for specific information.
question:Does your company have a professional product selection engineering team?
answer:Yes, our team includes experienced engineers specializing in market analysis and product selection to meet diverse needs.
question:Why can other suppliers source discontinued models you can’t?
answer:Suppliers may use unauthorized channels or existing stock. We focus on current products to ensure quality and compliance.
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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