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Home Product M5*20 Hexagonal Flange Screw DIN 6921 Stainless Steel A2-70 Metric Fastener
Hexagonal flange screws

M5*20 Hexagonal Flange Screw DIN 6921 Stainless Steel A2-70 Metric Fastener

Hexagonal flange screws M5x20
DIN 6921 flange bolts
Flange head machine screws M5-20
Hexagonal flange screws M5*20
Hexagonal flange screws M5x20, DIN 6921 flange bolts with flange head machine screws M5-20, designed for secure fastening in machinery and automotive applications.
Categories:Fasteners & Fixings
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Product Description

Hexagonal flange screws M5x20, also known as DIN 6921 flange bolts or flange head machine screws M5-20, are standardized fasteners featuring an integrated hexagonal head with a serrated flange base (typically 11.5mm diameter) for vibration resistance. This M5x20 variant has a 5mm thread diameter and 20mm shaft length under head, complying with ISO 15071 specifications. Designed for direct assembly without separate washers, they provide uniform load distribution with 8.8 tensile strength grade. Ideal for automotive, machinery, and structural applications requiring high shear strength and anti-loosening properties. Operates effectively in environments ranging from -50°C to +150°C. Advantages include simplified installation and reduced part count, though limited to non-corrosive applications without protective coatings. Common in electrical enclosures and engine components requiring secure fastening.
ParameterSpecification
DesignationHexagonal flange screws M5x20, DIN 6921 flange bolts
StandardDIN 6921, ISO 16538
Thread SizeM5 (5mm diameter)
Length20mm under-head measurement
Head TypeIntegrated hexagonal flange head
Flange Diameter12.5mm ±0.5mm
Flange Thickness1.75mm ±0.2mm
Drive TypeHexagon socket 8mm (ISO 4762)
Material GradeCarbon steel 8.8, Stainless steel A2-70
Surface TreatmentZinc-plated, Geomet®, or phosphate coating
Proof Load800MPa (8.8 grade), 450MPa (A2-70)
Installation Torque8.5-10.5Nm (lubricated steel), 6.5-8Nm (stainless)
ApplicationsMachinery assemblies, Automotive components, Structural fastening
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question:What does the warranty cover?
answer:Our product warranty covers defects in materials and workmanship.
question:Do you provide technical consultation?
answer:Yes, we offer free technical consultation to help you choose suitable products.
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:What payment methods do you accept?
answer:We support TT, PayPal, and other mainstream payment methods.
question:What does the warranty cover?
answer:Our product warranty covers defects in materials and workmanship.
question:Do you provide technical consultation?
answer:Yes, we offer free technical consultation to help you choose suitable products.
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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