Square Head Machine Bolts
Square head machine bolts—sometimes called square head bolts or square machine bolts—feature a square, flat-faced head that resists rounding and limits slippage under higher torque. Compared to standard hex heads, the broader contact area makes them easier to turn with a wrench or pliers when access is restricted.
What are square head machine bolts used for?
They’re used where strong wrench grip, higher torque, or tight-access tightening is needed—often in utility hardware, wood connections, machinery, and repair/retrofit work.
They’re used where strong wrench grip, higher torque, or tight-access tightening is needed—often in utility hardware, wood connections, machinery, and repair/retrofit work.