F363b Arca‑Type Quick Release Clamp with Integrated Bubble Level

The Hejnar Photo F363b is a precision‑machined 2.375 inch Arca‑type clamp featuring a sleek long black knob and a built-in bubble level. Designed for professional reliability, it offers a 3/8-16 threaded center socket and 1/4-20 tapped side holes to accommodate a wide variety of mounting configurations.

Quick Overview

• Model: F363b
• 2.375 inch Arca‑type compatibility
• Integrated bubble level for precise leveling
• Long black captive knob (cannot be lost in the field)
• Center socket: Countersunk and threaded 3/8-16
• Side holes: Two 1/4-20 tapped holes, 45mm apart
• 2.6mm deep safety relief grooves for secure plate engagement
• Anti-twist back-side groove for stable ball head connection
• Made in the USA

Product Description

The F363b Arca-type clamp is engineered for photographers who demand a secure, low-profile mounting solution with an all-black aesthetic. The long black knob is fully captive, meaning it stops at its maximum opening to prevent it from being lost in the field, while providing a comfortable grip for quick adjustments.

This clamp features 2.6mm deep relief grooves, ensuring compatibility with almost all Arca-type plates and rails. When used with plates featuring safety stops, these grooves act as a critical failsafe, preventing your camera from sliding out if the clamp is not fully tightened.

The underside of the F363b includes a specialized anti-twist groove designed to match common ball head interfaces, ensuring a rock-solid connection that won't shift under load. Precision CNC-machined from 6061-T6 aluminum and finished with a durable black hard-coat anodize, this clamp is built to withstand the rigors of professional use.