Fixing nut 3N6X05 (for 9SH137 series) and 3N8X1 (for 9SH147 series) are available for fine adjustment screws with threaded collar. It will allow fixing the screw at any depth in walls too thin for the 6 mm collar thread. It will fix a screw so that the locking screw is in desired orientation. When you order our units with these screws, we will make sure to include the fixing nut, in case the unit's wall is thin. In other cases you may order the nut separately. We could supply these screws with any other travel by request. ML, MN, MF models are lockable. Screws of pitch M4 x 0.25 are similar in dimensions. They are: 9SH147, 9SH147M, 9SH147ML, 9SH147MN, and 9SH147MF.

7T67-6-9SH137ML 7T67-6 with 9SH137ML installed	7T67-6-9SH137MN 7T67-6 with 9SH137MN installed