These drill hole diameters serve as a guide and apply to most materials. Depending on the strength of the material, the smaller or larger value is adopted (usually the mean value). In specific cases or with certain materials, the drill hole diameter is determined by testing. Minimum material thickness = length of bushing. For blind holes, the drill hole depth equates to the length of the bushing + 3 to 4 x pitch of the male thread. The drill holes must be countersunk. The edge distance of the bushing must not be less than approx. 0.3 x the outer diameter. Lubrication, e.g. with reca Bio Cut art. no. 0896 413 400, is recommended when screwing in.

A self-tapping thread insert with female and male thread. Cutting slots ensure effective working. The threaded bushing means that torn-out threads can be repaired quickly.