The teeth bite into the surfaces as the component parts are tightened.
M3 BOXED IN 100
M4 BOXED IN 100
M5 BOXED IN 100
M6 BOXED IN 100
M8 BOXED IN 100
M10 BOXED IN 100
M12 BOXED IN 100
M16 BOXED IN 50
M20 BOXED IN 25
M24 BOXED IN 25