Grade 12.9 Alloy Steel, Black Oxide, Partially Threaded
Features and Benefits
Socket cap head types have large cylindrical heads with recessed hex-shaped drives. They are ideal for applications where limited clearance would not allow the use of wrenches and sockets.
Hex socket drive types have a hex-shaped recess in the head and are driven with hex keys or hex socket bits. The driving surface is protected from external damage and provides six sides of contact surface for added torque.
Alloy steel is the strongest of all steel types. It has high tensile strength and offers excellent resistance to wear, fatigue and galling.
System of Measurement
Thread Size (mm)
Length Measurement Type
Length Under Head
Full or Partial Threading
DIN 912; ISO 898-1
Hex Key Size (mm)
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