English – 57
Repair instructions
7.30 Repairing damaged threads
Damaged threads can be repaired using a threading
plug. The slotted section in the thread plug is
screwed in place rst as this is the cutting part.
Request to repair a thread where a PL5 screw
was used. First drill with a 6.1 mm bit and then
screw in the thread plug using a suitable screw and
spanner.
If a thread for an MT4 screw must be repaired, rst
drill with a 5.1 bit and then screw in the thread plug
using a suitable screw and spanner.
This type of thread plug is ideal for plastic and
magnesium but cannot be used to repair aluminium
threads, where helicoil and metric screws must be
used instead. Check the manufacturer’s manual for
thread information.
Part No. Description
578 12 03-01 M5
503 27 39-01 PL5
503 27 31-01 MT4
Fig 91
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