The SPHERICAL METAL GROMMET’ is a plated steel bulkhead grommet offering superior firewall protection and cable & line clasping ability. The 2-pc eyeball clamp swivels up to 50° to allow for oblique, angled installations. It mounts on either side of the bulkhead using 4-40 screws (incl) or two 1/8″ blind rivets (not incl). Template for fastener & grommet (1-1/8″ OD) mounting holes incl. Grommet clamp hole may be easily enlarged up to .260 as needed. Back plate size: 2-1/6″x 1-7/16″ STC approval pending. SE188S typical application for standard Bowden cables, SE260S typical application for standard tach cables.