An
externally threaded fastener with
metric threads, a cylindrical head
with a flat chamfered top surface,
knurled cylindrical sides, and a hexagonal
recess. Generally manufactured in
accordance with DIN Standard 912 or
ISO Standard 4762
Ideal for precision assembly work
with close tolerances and applications
needing a well tooled appearance.
Supplies greater tensile strength
than equivalent sizes of hex cap
screws while requiring less surface
area or counter-bore since the fastener
is internally wrenched.
