12.9 grade DIN916/GB80 set screws are high-strength headless fasteners engineered with a concave end and fine thread, available in M4*0.5to M16*1.0 specifications. Compliant with both international (DIN916) and national (GB80) standards, these precision screws deliver exceptional hardness, torque capacity, and secure fastening performance for precision machinery and mechanical components.
Crafted from 12.9 grade alloy steel, they offer superior wear resistance and vibration stability, making them ideal for securing gears, pulleys, shafts, and rotating parts that require tight, non-slip connections. The fine thread design (M4*0.5-M16*1.0) ensures precise adjustment and enhanced holding power, while the concave end provides focused load distribution, minimizing workpiece damage during installation.
The hex socket drive enables secure tool engagement and precise torque control, critical for precision assemblies. As headless fasteners, they ensure a flush fit without protrusions, avoiding interference with moving parts. Suitable for engineers, machinery manufacturers, and maintenance professionals, these screws excel in automotive, aerospace, and industrial precision fastening scenarios.
Core Features & Advantages
12.9 Grade High Strength: Alloy steel construction for exceptional hardness, torque, and wear resistance.
Dual Standard Compliance: Meets DIN916 and GB80 standards for dimensional precision and universal compatibility.
Fine Thread & Concave End: Precise adjustment, strong holding power, and damage-minimizing load distribution.
Headless Hex Socket Design: Flush fit for moving parts, with secure tool grip and precise torque control.
Targeted Specifications: M40.5-M161.0 caters to precision industrial fastening needs.
Key Specifications
Material: 12.9 Grade Alloy Steel
Standards: DIN916, GB80
Drive Type: Hex Socket
Design: Headless, Concave End, Fine Thread Set Screw
