Recess / Drive Types
The recess or drive type of a fastener determines how it is tightened and what tool is required. Choosing the correct drive ensures efficient installation, reduces the risk of cam‑out, and improves torque transfer and long‑term reliability.
The examples below cover the drive types offered by FastenerFix across machine screws and bolts. Each provides different levels of torque capacity, tool compatibility and installation performance depending on the application.
Common Drive Types
Drive types vary in torque capacity, resistance to slippage, tool availability and suitability for manual or powered installation. The examples below represent the most widely used patterns.
Slot
A traditional single‑slot drive used across many of the machine screws available from FastenerFix. Best suited to light‑duty applications and manual installation, though more prone to cam‑out when used with power tools.
A traditional single‑slot drive used across many of the machine screws available from FastenerFix. Best suited to light‑duty applications and manual installation, though more prone to cam‑out when used with power tools.
Cross Slot
A two‑slot cross pattern offering better tool engagement than a single slot. Common on roofing bolts and other fixings where quick alignment and straightforward installation are required.
A two‑slot cross pattern offering better tool engagement than a single slot. Common on roofing bolts and other fixings where quick alignment and straightforward installation are required.
Pozi
A widely used drive type on machine screws. The additional ribs on the driver provide improved torque transfer and reduced cam‑out, making it ideal for both manual and powered installation.
A widely used drive type on machine screws. The additional ribs on the driver provide improved torque transfer and reduced cam‑out, making it ideal for both manual and powered installation.
Hex Socket (Allen)
A strong internal‑hex drive used on socket screws. Ideal where high clamping force or restricted access requires internal drive engagement rather than an external wrench.
A strong internal‑hex drive used on socket screws. Ideal where high clamping force or restricted access requires internal drive engagement rather than an external wrench.
External Hex
The standard drive for bolts and set screws. The six‑sided head provides excellent torque transfer and is compatible with spanners, sockets and impact tools for reliable tightening.
The standard drive for bolts and set screws. The six‑sided head provides excellent torque transfer and is compatible with spanners, sockets and impact tools for reliable tightening.