Type A - without dowel hole
Type B - with dowel hole
DIN 6303 Knurled Nut, Blackened Steel, Optional Dowel Hole
The dowel bore d5 in this knurled nut is designed for the use of clamping or notch pins. The nut is machined from solid bar stock and the knurling provides a secure grip.
Steel, tensile strength class 5 (500 N/mm), blackened
Also available in stainless steel.