Metric Precision Hex Socket Shoulder Bolts
A shoulder bolt — also called a shoulder screw — is a fastener with a precision-ground, unthreaded shoulder beneath the head and a short threaded section at the end. Toprecision shoulder bolts are produced from high-grade alloy steel and finished by precision grinding so the shoulder diameter is held within the tight h7 tolerance band. That ground shoulder serves a dual purpose: it clamps the assembly through its threaded end while acting as a true, smooth axle or locating pin for a pivoting or sliding part.
The internal hex socket head allows high tightening torque without cam-out, and the fine surface finish reduces friction and wear on the moving member. The result is a single component that both fastens and guides, delivering the axial accuracy and smooth rotation that precision mechanisms demand — replacing a separate bolt and bushing with one controlled part.
The result is one controlled component that replaces a bolt and a bushing, giving designers repeatable guidance and clamp in the same footprint.
Widely used where precise guidance meets secure fastening, these shoulder bolts appear in precision stamping dies, semiconductor packaging equipment, automated robotic arms and medical instruments. They are essential base components for linkage mechanisms that require frequent reciprocating motion, tight oscillation clearance and stringent repeatability in smart manufacturing.
From stamping dies and chip-packaging lines to robotic arms and instruments, it is the quiet enabler of precise, repeatable motion.
