Canon EF Screw CB2-0397
Canon YA2-0929 EF Screws
Genuine Canon collar retaining screws for the collar used in the EF 70-200 2.8 L USM, EF 70-200 2.8 L IS USM, and the EF 70-200 2.8 L IS II USM lenses.  Package of 1 screw. Made by Canon Japan.
The collar used with this screw is in stock here.
Canon CA2-4586 EF Screws
Genuine Canon lens contact retaining screws for over 100 of Canon EF, EF-M, EF-S, RF lens products including the EF 14 2.8L, EF 20 2.8 USM, EF 24 1.4L II USM, EF 28 2.8, 35 1.4L II USM, EF 50 1.2L USM, EF 50 1.4 USM, EF 85 1.2L II USM, EF 100 2.8 Macro, EF 16-35 2.8 L II USM, EF 70-200 2.8 L USM lenses, EF 200 2.8L USM, EF 200 2.8 L IS USM, EF 400 2.8 L, EF 400 2.8 L II IS USM, EF-M 18-55 3.5-5.6 IS STM, RF 28-70 2.0L USM and many others. Package of 2 screws. Made by Canon Japan.
Canon CA2-6822 Collar Screw
Genuine Canon collar retaining screw for the EF 100-400 4.5-5.6 L IS USM lenses and other Canon imaging products. Made by Canon Japan. Package of 1 screw. Made by Canon Japan.
Use with collar CA2-6842, in stock here.
Canon EF EF-S Screws YB2-5796
Canon XA9-1049 EF Screws
Canon XA9-1047 EF Screws
Genuine Canon shoulder screws for the EF 300 2.8 L IS USM and EF 400 4.0 DO IS USM lenses and other Canon imaging products. Package of 1 screw. Made by Canon Japan. This screw was made for this tripod collar guide roller.