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How tight should my scope mount screws be
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How tight should my scope mount screws be
Answer ID 795 | Published 03/30/2010 01:30 PM | Updated 11/17/2011 12:27 PM
How tight do I need to tighten the base and ring screws on my Sako Optilock or Tikka ring mounts
We suggest when ever possible using a torque reading screw driver or torque wrench when installing
scope mount bases and assembling scope mount rings. Reasonably priced and quality torque reading
screw drivers are available from a number of sources. We suggest contacting Brownells, Inc. if you need
to purchase one.
The Optilock scope ring cap screws should be torqued to 15-17 in/lbs, the Optilock base to scope ring
stud screw and the base to dovetail clamp screw should be torqued to 45 in/lbs.
Tikka aluminum scope ring cap screws should be torqued to 12-14 in/lbs maximum.
If using screw-on bases with drilled and tapped Tikka and Sako A-7 rifles we recommend 10 to 12 in/lbs if
you have 6 threads or less of engagement in the receiver thread and 15-17 in/lbs if you have more then 6
threads of engagement.
When installing screw-on bases that have 6 or less of screw thread engagement be vary judicious in the
amount of torque you apply to set the screws. With this little thread engagement it is very easy to strip the
screw thread from the action holes and this is not covered by the firearm warranty.
These are guide lines only. Common sense and a "feel for what you are doing" is still required. The head
style, slot, Allen (hex), Torx and the "grade" (hardness/quality) of the screw will all create some degree of
variation in how much torque can be applied to the screw without damaging the screw or stripping the
threads.
Notes: a) Scope mount ring cap screws do not require the application of a thread locker i.e. Loc-Tite. The
spring load of the scope ring cap around the scope tube will keep the screw tight.
b) We suggest a drop of Loc-Tite 222 or 242 grade thread locker be applied to screw-on type scope base
screws. Immediately after installing your bases check and make sure that the thread locker has not
seeped into the chamber or action of your firearm. If so clean the affected area and parts immediately with
a good gun solvent.
c) Never torque a screw home dry. If not using a thread locker on screws, such as scope ring cap screws,
apply a drop of oil to the underside of the head of the screw and the threads and than wipe "dry". There
will be enough residual oil to allow the screw to seat home smoothly.
If you need replacement parts for your scope mounting system, please view this answer.
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http://berettausa.custhelp.com/app/answers/detail/a_id/795/kw/Optilocks[8/13/2013 3:13:42 PM]