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Home Product Model M12*20 DIN 931 External Hex Bolt Grade 8.8 Zinc Plated
Metric external hexagonal bolts M12*20

Model M12*20 DIN 931 External Hex Bolt Grade 8.8 Zinc Plated

M12x20 hex bolt
M12x20 external bolt
DIN 933 M12x20 bolt
Metric external hexagonal bolts M12*20
M12x20 hex bolt with external hexagonal head, DIN 933 M12x20 bolt standard, fully threaded design. Suitable for machinery, construction, and industrial applications. Made of high-strength steel with zinc-plated finish. Reliable M12x20 external bolt for precise fastening.
Categories:Fasteners & Fixings
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Product Description

The M12x20 hex bolt, also known as the M12x20 external bolt or DIN 933 M12x20 bolt, is a metric fastener designed for high-strength mechanical connections in industrial applications such as machinery, construction, and automotive assembly. This external hexagonal bolt features a 12 mm nominal thread diameter and 20 mm shank length, compliant with DIN 933 standards for dimensional precision. Typically constructed from grade 8.8 steel or A2/A4 stainless steel, it offers tensile strengths up to 800 MPa with corrosion-resistant finishes like zinc plating. Suitable for environments operating between -50°C to +150°C, it requires standard M12 wrench sizing (19 mm across flats) for installation. Advantages include uniform load distribution and vibration resistance, though proper torque calibration is critical to prevent over-tightening. The coarse metric thread profile ensures compatibility with ISO-standard components in heavy-duty fastening systems.
Parameter Specification
Bolt Designation M12x20 hex bolt, M12x20 external bolt, DIN 933 M12x20 bolt
Thread Size M12 (Metric coarse thread, ISO 724)
Nominal Length 20 mm (total length under head)
Head Style Hexagonal external (DIN 933)
Thread Pitch 1.75 mm (standard for M12)
Material Grade Class 8.8 steel (ISO 898-1)
Surface Treatment Zinc-plated (ISO 4042)
Hexagon Width 19 mm (across flats per DIN 933)
Head Height 7.5 mm (standard head thickness)
Thread Length Fully threaded (DIN 933 requirement)
Torque Capacity 89 Nm (lubricated, ISO 16047)
Tensile Strength 800 MPa minimum (Class 8.8)
Proof Load 580 MPa (ISO 898-1)
Standard Compliance DIN 933, ISO 4014, EN 24016
Temperature Range -50°C to +250°C (zinc-coated steel)
question:Why is there a handling fee?
answer:Handling fees cover essential administrative, banking, and logistics services to ensure secure and efficient transactions.
question:What does the warranty cover?
answer:Our warranty ensures reliable product quality and dedicated support, reflecting our 20-year expertise as Asia's leading industrial automation provider.
question:Why choose us over other suppliers?
answer:With 20 years as Asia's top industrial automation trader, our proven quality and 85% repeat clientele ensure trusted, reliable partnerships.
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:Handling fees cover essential administrative, banking, and logistics services to ensure secure and efficient transactions.
question:What does the warranty cover?
answer:Our warranty ensures reliable product quality and dedicated support, reflecting our 20-year expertise as Asia's leading industrial automation provider.
question:Why choose us over other suppliers?
answer:With 20 years as Asia's top industrial automation trader, our proven quality and 85% repeat clientele ensure trusted, reliable partnerships.
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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