3.25 clamp - flat surface mount 4 RRS Kirk Markins Arca Swiss Acratech Benro

Description

Hejnar Photo F163
PART - F163b
Please note that not all items shown on the pictures may be included in the   auction, and they are for presentation purposes only.  To determine   items for sale please see reference in the section "
Auction Includes
".
Description:
New Hejnar Photo Quick Release Screw-Knob 3.25 inch clamp with dual mounting and captive style knob. Knob will not interference with surface when clamp is mounted on it. Knob can be also rotated using hex key. It is the best quick release system for tripods when combined with Arca style ball head.
Specification:
3.25 inch long
Weight 6.1oz (172g)
Center socket is countersunk on top for 1/4-20 or M6 screw, but also threaded 3⁄8”-16.
Two outside holes are taped 1/4-20 and 45mm apart from each other.
2.6mm deep relief grooves   guarantee
compatibility with most plates/rails.
Relief groove  prevents free fall when the clamp is not fully closed and your plate has safety stops
Knob is captive. Knob stops at maximum opening  - cannot be lost in the field
Knob is made from one part aluminum. No room for dust or sand.
Back side has grove to match some ball heads connection and preventing it from twisting.
Tongue-in-pocket Design -Clamps have a tongue-in-pocket design that protects internal parts from
dust and grit. It does prevent  the tendency of the moving jaw to hinge backward during clamping, It keeps the jaws aligned with the geometry of the plate and eliminating unwanted bending forces on the threaded stud.
Precision C.N.C. machined from 6061-T6 Aluminium
Compatible with Kirk, R.R.S., Arca-Swiss, and many other Arca-Swiss style Quick release plates.
Stainless steel hardware.
Black hard coat anodized clamp and clear anodized knob.
Made in USA.
Auction Includes:
One 3.25 inch clamp.
One 1/4-20 - 7/8 mounting screw .
Hex key for ¼-20 screw.