M12x40 Hex Flange Screws DIN 6921 High Strength Heavy Duty Bolts Zinc Plated

Hex flange screws M12x40

M12x40 hexagonal flange bolts

DIN 6921 flange screws M12

Hexagonal flange screws M12*40

Hex flange screws M12x40, M12x40 hexagonal flange bolts, DIN 6921 M12 flange screws. High-strength steel with integrated washer, vibration-resistant. Designed for machinery, automotive, and construction applications.

Specification

SEODescription

The Hex flange screws M12x40, also known as M12x40 hexagonal flange bolts, are standardized fasteners compliant with DIN 6921 flange screws M12 specifications. Designed for heavy-duty industrial applications, these screws feature a 12mm diameter and 40mm shank length with an integrated hexagonal flange for load distribution. They operate without electrical input/output but mechanically interface with DIN-compliant modules through M12 threading, typically used in machinery assembly, automotive frameworks, and structural steel connections. The flange design eliminates separate washers, offering vibration resistance and enhanced clamping force. With a tensile strength rating of 8.8 to 12.9 grade, they withstand temperatures from -50°C to +150°C and environments up to 1000V insulation. Key advantages include corrosion-resistant zinc plating and tool-accessible hex head, while limitations involve requirement for precise torque calibration and restricted use in ultra-high-pressure hydraulic systems.

SEOSpecification

Parameter	Specification
Standard	DIN 6921 flange screws M12
Thread Size	M12x1.75
Length	40mm
Flange Diameter	28.5mm
Head Height	8.0mm
Material	Carbon steel/Stainless steel A2-70
Strength Grade	8.8/10.9
Surface Treatment	Zinc plating/Geomet® coating
Hex Socket Size	10mm (ISO 4762)
Torque Value	115Nm (grade 8.8 lubricated)
Alternative Names	Hex flange screws M12x40, M12x40 hexagonal flange bolts

SEOQandA

question:Can the company ensure stable supply?
answer:Yes, we maintain stable supply through reliable partnerships and efficient logistics.
question:Can upgraded or alternative models be provided?
answer:We offer upgraded or alternative models based on availability and client requirements.
question:Can I arrange self-pickup via official courier?
answer:Self-pickup via official courier can be arranged upon prior confirmation and coordination.

SEOQandA_Product

question:Screw head stripping during installation
answer:Use correct hex tool size and apply controlled torque to prevent stripping.
question:Loosening under vibration or load
answer:Apply thread locker or use a lock washer to maintain secure fastening.
question:Corrosion in harsh environments
answer:Select stainless steel or coated screws and inspect regularly for protection.
question:Flange not seating properly on surface
answer:Ensure surface is flat, clean, and use washers if needed for even contact.
question:Shearing due to excessive shear stress
answer:Verify screw grade meets required shear strength and avoid over-tightening.