This pack of Wimberley Safety Stop Screws includes two M3 x 6mm type screws that are compatible with camera and lens plates as well as replacement lens feet. Having the screws in place on the bottom of the plates prevents the plates and the replacement feet from sliding out if a clamp or head is accidentally opened. A 2.5mm hex key is used to tighten the screws.

Compatible with Camera and Lens Plates    Fits Replacement Lens Feet    Uses 2.5mm Hex Key

Related Questions and Answers

Q: 1. Will these screws fit all canon long lenses (500 f4, 600 f4...)?

A: M4 x 14mm Hex Socket Head Cap Screw (3mm hex drive) For Replacement Feet: AP-600 AP-601 AP-602 AP-603 AP-604 AP-608 AP-652 For Canon: 400 f/2.8 IS (ver. I & II & III) 600 f/4 IS (ver. I & II & III) 800 f/5.6 IS For Sigma: 150-600 f/5.0-6.3 Sports 500 f/4 DG OS HSM

Q: 2. Will this work with the Induro BHB2 Gimbal

A: Unfortunately, the Wimberley M-9 module is not compatible with the Induro BHB2 Gimbal. This module is only compatible with the Wimberley Head Version II. You could use the Wimberley F-1 Telephoto Combo Flash Bracket (B&H # WIF1) with your Induro Gimbal head.

Q: 3. I want to remove the foot from the tripod collar of my Nikon 600mm f/4E FL ED VR lens. There appears to be 4 screws. What's the proper tool or hex key size for loosening these screws?

A: To take off the Nikon 600mm f/4E FL ED VR lens you need a 2.5mm hex key like the one that comes with the Wimberley Set of 4 Screws for Select Lens Feet (M3 x 12mm).

Q: 4. what are the thread specs? ( do they match typical 19 rack threads? )...

A: Hello Dennis,The ThumbSet screws are 4-40 type and are specific for mounting 500 series modules into our Workhorse power racks - they are too small to mount standard 19 equipment into equipment racks.Regards,Ryan

Q: 5. What is the length of these screws?

A: Ikan lists the dimensions of the ikan 3/8"-16 D-Ring Screws as 0.59 x 1.06 x 1.08"

Q: 6. Are these approved by NASA?

A: The American Paper Optics Solar Eclipse Safety Glasses are ISO 12312-2 and CE certified which is what NASA recommends for safe solar viewing.

Q: 7. What's the length of these thumb screws?

A: The threaded sections of the 9.SOLUTIONS GoPro Thumb Screws (2-Pack) are 0.78 inches, and the entire length of the screws are 2.12 inches.

Q: 8. Can we curve the glasses around face to secure in place?

A: Yes, you can curve the American Paper Optics Solar Eclipse Safety Glasses around your face, but it is not necessary.

Q: 9. Can this fit the Mefoto camera plates?

A: The dimensions of these screws are 0.59 x 1.06 x 1.08 (1.50 x 2.70 x 2.75 cm) You can measure the plate and hopefully the Mefoto screw to check. It seems that these might be a little large in the ring and head. Unfortunately, it is not possible for us to go to our inventory to check here at B&H. Here are all the available quick release plate screws B&H has for sale. http://bhpho.to/1UC21jQ

Q: 10. Will this mount clear the GoPro Hero 9 or later?

A: Yes. The 9.SOLUTIONS GoPro Thumb Screws will work for GoPro Hero 9 and later.