M5×8 Hex Flange Screw - Hexagonal Flange Bolt, High-Strength Steel, DIN 6921, Zinc Plated Fastener

Hexagonal flange screws M5x8

M5x8 hex flange screws

DIN 6921 M5x8 screws

Hexagonal flange screws M5*8

Hexagonal flange screws M5x8, also known as M5x8 hex flange screws, comply with DIN 6921 standards for precision engineering. These DIN 6921 M5x8 screws feature integrated flange heads for secure fastening, made from durable steel with corrosion-resistant zinc plating. Ideal for machinery, automotive, and electronics applications requiring vibration resistance and easy installation.

Specification

SEODescription

Hexagonal flange screws M5x8, also known as M5x8 hex flange screws or DIN 6921 M5x8 screws, feature a 5 mm thread diameter and 8 mm length with a hexagonal head integrated into a circular flange for secure fastening. Designed to DIN 6921 standards, these screws typically use steel or stainless steel (A2/A4 grades) with optional coatings like zinc or galvanization. The flange diameter measures ~10 mm, providing distributed load support and vibration resistance. Operating within -50°C to +250°C, they suit automotive, machinery, and electronics assembly. Advantages include tool compatibility (5 mm hex key), reduced washer dependency, and anti-loosening stability. Limitations involve limited adjustability post-installation and potential corrosion in chloride-rich environments without protective coatings. Their compact design optimizes space-constrained applications requiring high shear strength.

SEOSpecification

Parameter	Specification
Standard	DIN 6921
Material	Stainless Steel A2/A4 or Steel Grade 8.8
Surface Treatment	Zinc-plated, Geomet® (Dacromet), or Plain
Thread Size	M5x1.0
Length Under Head	8 mm
Head Type	Hexagonal Flange
Flange Diameter	11 mm
Head Height	5 mm
Torque Value (8.8 Grade)	8.5 Nm ±10%
Tensile Strength	800 MPa (Grade 8.8)
Hardness	HRC 22-32 (Grade 8.8)
Temperature Range	-50°C to +250°C (A2 Stainless)
Application	Automotive, Machinery, Structural Connections

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SEOQandA_Product

question:How to prevent Hexagonal flange screws M5*8 from loosening under vibration?
answer:Apply thread-locking adhesive during installation to secure the screw and prevent vibration-induced loosening.
question:What causes Hexagonal flange screws M5*8 to strip during tightening?
answer:Over-tightening or incorrect tool size. Use a calibrated torque wrench and ensure proper hex key fit.
question:Why does the flange on M5*8 screws fail to seat properly?
answer:Misaligned or damaged mating surface. Inspect and clean the flange seat before installation.
question:How to address corrosion on Hexagonal flange screws M5*8?
answer:Use corrosion-resistant materials like stainless steel or apply protective coatings for harsh environments.
question:What causes Hexagonal flange screws M5*8 to shear under load?
answer:Excessive load or material weakness. Verify load capacity and upgrade to higher-grade screws if needed.