Canon CA2-4585 EF Screws
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 CA2-4923 Brass Collar
Genuine Canon brass collar for the EF 100-400 4.5-5.6L IS USM lens. Made by Canon Japan. The screw required to retain this collar is available here.
Use the choose an option and select from available sizes.
Use the choose an option and select from available sizes. 
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 CA2-6842 Guide Collar
Canon CA4-1847 Terminal Cover
Canon CB1-2553 Grip Contact
Canon CB1-3357 Film-Cartridge Contact
Genuine Canon replacement film cartridge contact for the EOS Rebel G, G II, G QD, and the EOS 500N film cameras. When a film cartridge is installed, this contact closes so when the back cover is closed the camera will preload. The most common problem when this contact is damaged or broken... the camera will not pre-load the film to frame 1.
