Pertains to the 19°,26°,36° and 50° Lens Tubes:
In 1996, ETC was using for the S4 Lens Tube:
4x HW391 --- Screw, 8-32 x 3/4 phPHMS B/Z
8x 7060A4012 --- Lens Pad Support
6x 7060A4009 --- Bushing Guides
Around 1997, ETC started using for the S4 Lens Tube:
4x HW369 --- Screw, 8-32 x 5/8 PhPHMS BO
10x 7060A4012 --- Lens Pad Support
8x 7060A4009 --- Bushing Guides
Around 2006, ETC started using for the S4 Lens Tube:
4x HW3154 --- Screw, 8-32 x 5/8 PhPHMS BO Taptit B/Z Waxed
The HW369 is a machine screw and required a nut for assembly.
The HW3154 is a thread forming screw that threads into the casting so no nut is needed. If the S4 had the HW369 screw + nut, then those need to be used for replacing, because the screw hole in the tube would be too large for the current HW3154 screw.
Share the ETC love! Do you think this information would be helpful to a friend? Fill out the form below to send the page to other recipients, or send it to yourself to save for future use.