RAM Mounts Cameras Motion Sensors Devices Tough-Ball with 1/4-20 x .25 Threaded Stud RAP-B-379U-252025 with B Size 1 Ball

1/4-20 post is much shorter than pictured, only 3/8 long.

I have been using RAM Mounts for over ten years and there is no better or more versatile products for mounting any accessory to a dashboard. I recently mounted a VASCAR, speed measuring device, to my dash. The adjustable and strong, articulating arm, has endless adjustments. I have a portable, suction mount, for a GPS for rental cars, when traveling; most suction mounts do not hold. The RAM one holds better and longer than any other ones that I have used.

Excellent for use on a Kayak

This will work well for the phone holder am inventing :)))

Threads coulda been a bit longer, but works good

great product and fast shipping

good

I dont own this specific item but the picture does appear to be wrong here and on rammount.com. Instead of buying this item RAP-B-379U-252025 with the 1/4-20 x .25 male threaded post, you want the 1/4-20 x .375 male threaded post RAP-B-379U-252037, the 1/4-20 x .50 male threaded post RAP-B-379U-252050 or the 1/4-20 x .625 male threaded post RAP-B-379U-252062.

Works great, just what I needed.

This looks good and is purported to have a stronger stainless mounting stud. Obviously it has a integrated hex nut for tightening which is never a problem if you have any RAM arms because you can always tighten one of them on the ball and use it for leverage in tightening the mounting stud. The trouble with this one as Ive discovered is that it moves more, in a bouncing rubber ball sort of way, than my other RAM balls of the type that are a ball on a metal shaft. Ive used these for mounting a camera on my motorcycle to keep other drivers honest and this one jiggles around and provides blurry video. Its fine when stationary but unacceptable when traveling down the street over bumps and other shocks.