IAI America ISWA - Manual (Page 31)

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5. Installation
CAUTION: Since the tap is a blind hole, please be careful when setting the bolt length.
Inadequate bolt usage may cause tap hole breakdown as well as lead to lack of
intensity in actuator mounting, thus lowering precision and may cause an accident.
Description of the Set Screws
For the base male set screw, use a hexagon socket head cap screw.
For the bolts to be used, a high-tensile bolt complying with ISO- 10.9 or more is recommended.
If using the tapped holes, use screws with the thread length dimension being less than the effective
depth of the holes.
In case the tapped hole is a through hole, be careful so the screw tip does not exceed the surface of
the tapped hole.
The length of thread engagement should be 1.8 times more than the nominal diameter.
Apply a washer dedicated for high-tensile screw when the screw-seated surface on the base is
aluminum (otherwise the seated surface may sink).