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Home Product M8x18 Metric Hex Head Bolt, Brand Name Series, Grade 8.8 Zinc-Plated Steel for Automotive Machinery Construction
Metric external hexagonal bolts M8*18

M8x18 Metric Hex Head Bolt, Brand Name Series, Grade 8.8 Zinc-Plated Steel for Automotive Machinery Construction

M8 hex bolt
M8x18mm hex screw
metric hex head bolts
Metric external hexagonal bolts M8*18
Metric hex head bolts, M8 hex bolt, M8x18mm hex screw, 18mm length, DIN 931 standard, zinc-plated finish, ideal for metric fastening applications.
Categories:Fasteners & Fixings
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Product Description

The M8 hex bolt, also known as an M8x18mm hex screw or metric hex head bolt, features a 6mm hexagonal head with an 8mm nominal thread diameter and 18mm shaft length. Manufactured from grade 8.8 steel (or optional A2/A4 stainless steel), it operates in temperatures from -50°C to +120°C. This fastener adheres to ISO 4014/DIN 933 standards, offering a tensile strength of 800 MPa and 640 MPa yield strength. With corrosion-resistant zinc plating or stainless variants, it withstands harsh environments in automotive, machinery, and construction applications. The 13mm wrench size enables secure installation using standard tools. While providing robust clamping force, its small size limits load capacity for heavy structural applications. Surface treatments enhance wear resistance in high-vibration industrial settings.
Parameter Specification
Thread Size M8 (ISO 4014/DIN 931)
Length 18mm
Head Type Hexagonal (DIN 931/ISO 4014)
Material Carbon steel/Stainless steel A2/A4
Strength Grade 8.8/10.9 (Carbon steel), A2-70/A4-80 (Stainless)
Surface Finish Zinc plated/Black oxide/Dacromet
Thread Tolerance 6g (ISO 965-1)
Across Flats 13mm
Head Height 5.3mm
Thread Length ≈15mm (DIN 931)
Hex Key Size 10mm
Torque Value 20-22 N·m (Grade 8.8 lubricated)
Temperature Range -50°C to +250°C (Zinc plated)
Standards ISO 4014, ISO 4017, DIN 931, DIN 933
Application General machinery, construction, automotive assemblies
question:Why can other suppliers find discontinued models while you can't?
answer:We prioritize current models; limited supply chain resources restrict access to discontinued items.
question:What shipping methods do you support?
answer:We support DHL, Fedex, UPS, and other major carriers for reliable global delivery.
question:Why charge a handling fee?
answer:Handling fees cover logistics, documentation, and secure order processing to ensure reliability.
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 can other suppliers find discontinued models while you can't?
answer:We prioritize current models; limited supply chain resources restrict access to discontinued items.
question:What shipping methods do you support?
answer:We support DHL, Fedex, UPS, and other major carriers for reliable global delivery.
question:Why charge a handling fee?
answer:Handling fees cover logistics, documentation, and secure order processing to ensure reliability.
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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