Kupo KS-344 3/8""""-16 Twist-to-lock screw for Rock's Arm

Kupo KS-344 3/8”-16 Screw – ARRI-Style Anti-Rotation Tip for Rock’s Arm

The Kupo KS-344 is a 3/8”-16 screw designed with an ARRI-style anti-rotation tip for use with Rock’s Arm. It provides a common and reliable connection used across video and cinema equipment, especially on camera cages. The screw combines hand-operable tightening with the option for tool-assisted re-tightening.

Key features

• 3/8”-16 thread: Uses the widely adopted 3/8”-16 connection standard found in the video and cinema industries.
• ARRI-style anti-rotation tip: Designed to resist rotation in compatible ARRI-style sockets, improving stability when mounted.
• Knurled tightening knob: Includes an integrated knurled thumbscrew so you can tighten and loosen the screw by hand for quick setup and release.
• Allen wrench hole: Features a hole for a #3 Allen wrench to allow stronger, tool-assisted re-tightening when needed.

Use cases and compatibility

The KS-344 suits filmmakers and camera operators who use Rock’s Arm and other gear that accept 3/8”-16 threaded fasteners or ARRI-style anti-rotation tips. It commonly connects to camera cages and similar mounting points in video and cinema setups. Because it offers both hand-tightening and an option for Allen-wrench tightening, it adapts to quick adjustments as well as more secure final tightening.

How to use

1. Insert the ARRI-style anti-rotation tip into the corresponding socket on your Rock’s Arm or camera cage.
2. Tighten by hand using the integrated knurled thumbscrew for a fast, tool-free fit.
3. For a firmer lock, insert a #3 Allen wrench into the provided hole and re-tighten as needed.
4. When you need to remove or reposition, loosen the thumbscrew by hand for quick release.

Specification

FAQ

Question: Will the KS-344 fit my camera cage?
Answer: If your camera cage or accessory accepts a 3/8”-16 threaded connection or an ARRI-style anti-rotation tip, the KS-344 is designed to fit those standard mounting points.

Question: Can I tighten and loosen this screw without tools?
Answer: Yes. The screw has an integrated knurled thumbscrew that allows hand tightening and quick release for fast adjustments.

Question: When should I use the Allen wrench hole?
Answer: Use the hole with a #3 Allen wrench when you need a firmer, more secure re-tightening beyond what you achieve by hand.

Question: How heavy is the KS-344 and does the weight affect mounting?
Answer: The KS-344 weighs 45g. This weight is specified for reference when planning mounts and payloads on Rock’s Arm or camera cages.