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Home Product Hexagonal Flange Screws M8*50 - High Strength Zinc Plated Bolts for Machinery & Automotive Repair
Hexagonal flange screws

Hexagonal Flange Screws M8*50 - High Strength Zinc Plated Bolts for Machinery & Automotive Repair

Hex flange screws M8x50
M8-50 hex flange bolts
DIN 6921 flange screws M8x50
Hexagonal flange screws M8*50
Hex flange screws M8x50, DIN 6921 compliant flange screws, also called M8-50 hex flange bolts, feature an integrated washer for industrial machinery, automotive assemblies, and construction applications. High-strength design with vibration resistance ensures reliable fastening.
Categories:Fasteners & Fixings
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Product Description

Hex flange screws M8x50, also designated as M8-50 hex flange bolts or DIN 6921 flange screws M8x50, feature an 8mm thread diameter and 50mm shank length, designed for high-stress industrial applications. Manufactured from grade 8.8 carbon steel or A2/A4 stainless steel, these screws offer tensile strengths up to 800 MPa (for steel variants) with optional zinc-plated or hot-dip galvanized finishes for corrosion resistance. The integrated hexagonal flange distributes clamping force across surfaces, eliminating the need for separate washers. They operate reliably within -30°C to +120°C temperature ranges, making them ideal for automotive assemblies, machinery construction, and structural frameworks. Key advantages include vibration resistance, simplified installation, and compatibility with DIN 6921 standards. Limitations include potential galvanic corrosion in dissimilar metal pairings. Torque specifications typically range 20-25 Nm for steel variants in standard applications.
Parameter Specification
Product Type Hexagonal flange screws (DIN 6921 flange screws M8x50)
Thread Size M8 (Metric coarse thread)
Length Under Head 50 mm
Head Type Hex flange with integrated washer
Flange Diameter 17.23 mm
Flange Thickness 4 mm
Drive Type Hexagonal socket (ISO 4762)
Material Grade Carbon steel (Grade 8.8) / Stainless steel (A2-70)
Surface Treatment Zinc-plated / Geomet® / Dacromet®
Torque Value 22.5 Nm (Grade 8.8, lubricated)
Standards Compliance DIN 6921, ISO 1665 (M8-50 hex flange bolts)
Hex Key Size 13 mm (AF)
Tensile Strength 800 MPa (Grade 8.8)
Flange Bearing Surface Serrated underside (DIN 6921 specification)
question:How do you handle shipping?
answer:We support DHL, Fedex, UPS, and other mainstream shipping methods.
question:Can I schedule self-pickup with official couriers?
answer:Yes, self-pickup can be arranged if notified in advance with courier details.
question:Do you provide technical selection services?
answer:Yes, we offer technical guidance to help select suitable products per requirements.
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:How do you handle shipping?
answer:We support DHL, Fedex, UPS, and other mainstream shipping methods.
question:Can I schedule self-pickup with official couriers?
answer:Yes, self-pickup can be arranged if notified in advance with courier details.
question:Do you provide technical selection services?
answer:Yes, we offer technical guidance to help select suitable products per requirements.
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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