Scubapro 28mm retainer ring socket precision machined from stainless steel with an 8mm hex connection.

The Scubapro 28mm retainer ring socket is a high-grade, professional workshop tool designed specifically for life-support technicians servicing environmentally sealed first-stage regulators. This specialised tool provides a flawless mechanical connection for opening and closing the diaphragm retainer ring on the Scubapro MK17 Evo and MK19 Evo first stages.

Precision-machined to clear narrow tolerances, it delivers uniform torque distribution, minimizing the risk of slipping or scratching the regulator's exterior. Due to the precision-engineered thin walls of this socket, it features a maximum recommended torque rating of 35Nm; for severely seized components that exceed this threshold, universal yoke nut pliers should be utilized.

How It Works:

Connection: Insert an 8mm long hex key (paired with a 3/8" drive adaptor) or a standard 5/16" hex key securely into the integrated hex connection point at the back of the socket.
Alignment: Fit the 28mm socket flush over the diaphragm retainer ring on the regulator body, ensuring complete and level engagement with the hexagonal flats of the component.
Operation: Apply steady manual pressure and turn smoothly to unthread or retighten the retainer ring. Always use a calibrated torque wrench during final assembly to remain strictly under the maximum 35Nm tolerance limit.

Key Features & Specifications:

Premium Stainless Steel Body: Precision CNC-machined from high-strength stainless steel to ensure robust structural integrity and superior corrosion resistance.
Dual-Hex Drive Interface: Feature-packed with an 8mm hex connection point that remains fully compatible with imperial 5/16" hex drivers for international workshop flexibility.
Component-Specific Engineering: Tailored with a custom reduced wall thickness to accommodate the structural design profiles of modern Scubapro first stages.
Direct Component Compatibility: Purpose-built to perfectly interface with Scubapro part number 10.714.110 (Diaphragm retainer AF MK17evo + MK19evo).

Technical Details: