Blackmagic Design URSA Mini Pro Mount Screws EF

Replacement EF mount mounting screws for Blackmagic URSA Mini Pro cameras. The EF mount is secured to the camera body by four M3 × 18 mm screws with a 2 mm internal hex, which are compatible with both EF and F mounts.

Original replacement mounting screws from Blackmagic Design for the EF mount on Blackmagic URSA Mini Pro cameras. According to the manufacturer’s instructions, the mount is secured to the camera body by four M3 × 18 mm screws with a 2 mm internal hex; these same screws are used in both the EF and F mounts, so the manufacturer recommends storing them together with the corresponding mount.

The URSA Mini Pro mount is user-replaceable, so the screws must be loosened and tightened every time you switch between EF, F, PL, and B4 mounts—or when shims are added under the mount to adjust the back focal length. During such operations, it is easy to lose a screw.

The manufacturer recommends tightening the screws with a 2 mm Allen wrench—ideally a torque wrench set to 0.45 Nm—applying even pressure in the specified order. Over-tightening can damage both the thread and the mount.