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Home Product M3*40 Hex Socket Head Cap Screw Cylindrical DIN 912 Stainless Steel A2-70
Cylindrical head hexagon socket screws M3*40

M3*40 Hex Socket Head Cap Screw Cylindrical DIN 912 Stainless Steel A2-70

M3x40 hex socket screws
Cyl head hex screws M3x40
M3x40 cylindrical Allen screws
Cylindrical head hexagon socket screws M3*40
M3x40 hex socket screws with cylindrical head design, crafted from durable stainless steel for corrosion resistance. Cyl head hex screws M3x40 feature precise ISO-compliant dimensions and Allen key compatibility, ideal for machinery assembly and electronics. M3x40 cylindrical Allen screws deliver reliable, heavy-duty fastening solutions with hex socket drive functionality.
Categories:Fasteners & Fixings
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Product Description

The M3x40 hex socket screws, also known as Cyl head hex screws M3x40 or M3x40 cylindrical Allen screws, are precision-engineered fasteners with a 3mm diameter and 40mm length. Designed with a cylindrical head and internal hexagon socket (Allen key drive), these screws offer high torque transmission capability for secure assembly. Typically made from stainless steel (A2/A4) or carbon steel with zinc plating, they feature a 4.8 or 8.8 strength grade. Suitable for machinery, automotive, and electronics industries, they operate in temperature ranges from -50°C to 300°C depending on material. Advantages include flush surface mounting, vibration resistance, and space-efficient design, while requiring specific Allen key tools for installation limits accessibility. Surface treatments enhance corrosion resistance for outdoor or harsh environments.
ParameterSpecification
Thread SizeM3x40 (Metric)
Head TypeCylindrical Hex Socket
Drive TypeHexagonal Socket (Allen)
Material GradeClass 4.8/8.8/12.9 Steel
Surface FinishZinc Plated/Black Oxide
Head Diameter5.5mm ±0.2mm
Socket Size2.5mm Hex Key
Thread Pitch0.5mm (Standard Metric)
Tensile Strength400MPa (4.8 Grade)
StandardsISO 4762:2004 / DIN 912
Min Torque2.0Nm (Zinc Plated)
question:Can I book official courier self-pickup independently?
answer:Self-pickup requires prior authorization. Contact us to coordinate logistics.
question:Why do other suppliers offer discontinued models we can't price?
answer:They may access residual stock. We adhere to updated availability data.
question:How is refurbished product failure handled post-purchase?
answer:We honor warranty claims. Non-repairable items get replacement/refund per policy.
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 I book official courier self-pickup independently?
answer:Self-pickup requires prior authorization. Contact us to coordinate logistics.
question:Why do other suppliers offer discontinued models we can't price?
answer:They may access residual stock. We adhere to updated availability data.
question:How is refurbished product failure handled post-purchase?
answer:We honor warranty claims. Non-repairable items get replacement/refund per policy.
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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