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Home Product M12*40 Hex Flange Screws DIN 6921 Class 8.8 Galvanized Steel Fasteners for Automotive Machinery Construction
Hexagonal flange screws

M12*40 Hex Flange Screws DIN 6921 Class 8.8 Galvanized Steel Fasteners for Automotive Machinery Construction

Hex flange screws M12x40
M12x40 hexagonal bolts
Hexagonal flange bolts 40mm
Hexagonal flange screws M12*40
Hexagonal flange screws M12x40 for heavy-duty mechanical, industrial, and structural applications. High-strength galvanized steel M12x40 hexagonal bolts feature integrated flange bases for load distribution. Hexagonal flange bolts 40mm in length offer secure fastening with wrench-friendly 6-sided heads. Ideal for machinery, construction, and automotive assemblies requiring vibration resistance. Combines M12x1.75 thread pitch with 40mm shank length.
Categories:Fasteners & Fixings
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Product Description

The Hex flange screws M12x40, also known as M12x40 hexagonal bolts or Hexagonal flange bolts 40mm, are high-strength fasteners designed for heavy-duty industrial applications. These screws feature a 12mm diameter, 40mm length, and a hexagonal flange head with integrated washer functionality, eliminating the need for separate washers. Manufactured from grade 8.8 or 10.9 carbon steel or A2/A4 stainless steel, they offer tensile strengths up to 1,000 MPa and torque resistance of 82-90 Nm. The flange diameter measures 34mm, providing enhanced load distribution. Suitable for temperatures ranging from -30°C to +120°C, they are widely used in automotive assembly, machinery manufacturing, and structural engineering. Key advantages include vibration resistance, corrosion protection (with optional zinc plating or dichromate coating), and simplified installation. However, their fixed flange design limits adjustability in precision applications. Compliant with DIN 6921 and ISO 4162 standards.
Parameter Specification
Product Designation Hex flange screws M12x40
Thread Size M12 x 1.75
Length (L) 40mm ±1mm
Hex Size 10mm
Flange Diameter 24mm
Material Grade Carbon steel (8.8/10.9) / Stainless steel (A2/A4)
Surface Treatment Zinc-plated / Dacromet coating / Plain
Torque Value 75-85 Nm (lubricated)
Standard Compliance DIN 6921 / ISO 1661
Flange Thickness 2.2mm ±0.3mm
Head Height 7.5mm ±0.5mm
Corrosion Resistance Class 3-5 (salt spray test 72-480h)
question:Can you provide upgraded or alternative models?
answer:Yes, we offer a range of upgraded and alternative models to meet various requirements.
question:What shipping methods do you support?
answer:We support DHL, Fedex, UPS, and other major shipping methods.
question:Can you ensure a stable supply of products?
answer:Yes, we maintain a stable supply chain and sufficient inventory to meet demand.
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:Can you provide upgraded or alternative models?
answer:Yes, we offer a range of upgraded and alternative models to meet various requirements.
question:What shipping methods do you support?
answer:We support DHL, Fedex, UPS, and other major shipping methods.
question:Can you ensure a stable supply of products?
answer:Yes, we maintain a stable supply chain and sufficient inventory to meet demand.
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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