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B2-FABN: 38MM Screw-Knob Clamp w/ Strap Bosses


Discover the lightweight and versatile B2-FABN mini-clamp by Really Right Stuff. A secure and hassle-free quick-release system for your camera gear.

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The Really Right Stuff 38mm Screw-knob Clamp, mini-clamp with 1/4"-20 threaded socket is a great clamp for traveling because of it being lightweight.

The B2-FABN mini-clamp has one 1/4"-20 threaded socket for screwing onto a 1/4"-20 threaded post or stud. This is also the perfect solution for shoulder straps such as Black Rapid and camera neck straps.
Why should you invest in a quick-release system? Because screwing your camera or lens onto a platform with standard 1/4"-20 screw is tedious and insecure. Not only is it a hassle to screw your gear onto that platform, but once installed the camera or lens is free to rotate; there's nothing to prevent it from coming loose. Why invest your money in a tripod and tripod head only to compromise your shots with an insecure connection between camera and head? Instead, adopt the Really Right Stuff quick-release system.

The Really Right Stuff quick-release system is perfectly compatible with all equipment made to the RRS Dovetail Standard (the most broadly accepted standard accross multiple industries) and is compatible with most Arca-Swiss style plates. It has two parts: a quick-release clamp and a quick-release plate. You always need both pieces of the system. The clamp will stay on your tripod head/accessory all the time, and the plate will stay on your camera all the time. You will need to purchase a separate quick-release plate for each camera or collared, telephoto lens that you want to mount in the quick-release clamp on your tripod head.

Clamp jaws open and close in one of two ways: by twisting a knurled knob on our tried & true screw-knob clamps; or by flipping a single lever on our innovative, patented lever-release clamps. Traditional screw-knob clamps are tried & true and can deliver slightly greater clamping force than our Lever Release clamps.


  • Lightweight quick-release clamp with three strap bosses. This is a wonderful solution for quickly attaching/removing your camera's neck strap or sling.
  • Perfect solution for shoulder straps with 1/4"-20 mounting stud, such as a Black Rapid
  • Dovetail on the bottom of the clamp, allowing it to be mounted within other Really Right Stuff clamps. This is useful when needing to change dovetail orientation (e.g. switching from non-collared to collared lenses).


Country of Origin: USA
  • Jaw Length: 1.5" / 38mm
  • Width: 2.9" / 72mm
  • Height: 0.6" / 16mm
  • Weight: 2.2 oz / 64g

In the Box

(1) B2-FABN clamp
(1) QR-Code Reference Card for User Manual


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