Knipex 4621A31 External Retaining Ring Pliers

Product Description

The KNIPEX 4621A31 is a bent-nose external retaining ring pliers designed for installing and removing external snap rings in tight or angled work areas. Built to DIN 5254 B standards, the tool features a 90-degree bent tip with a 2.30 mm tip diameter and a 0.090-inch tip size, allowing direct engagement with ring eyelets where straight access is not possible. The steel body is oil-hardened and forged for durability under repeated use. The overall length of 8.5 inches provides sufficient leverage for controlled snap ring work. Licensed HVAC techs, plumbers, electricians, and mechanical technicians regularly rely on this style of pliers for drivetrain, bearing, and housing assembly tasks.

This tool is suited for professional use in residential and commercial service environments wherever external retaining rings secure components on shafts or in bores. The bent nose configuration is particularly useful in confined spaces such as motor housings, pump assemblies, and equipment panels where a straight-nose tool cannot reach the ring eyelets at the correct angle. It is a standard tool for HVAC technicians working on motor shafts and blower assemblies, as well as plumbers and mechanics servicing pump and valve components.

Key Features

• 90-degree bent nose tip for access in confined or angled work areas
• Tip diameter of 2.30 mm with a 0.090-inch tip size for external ring eyelets
• Oil-hardened and forged steel body for long service life
• Meets DIN 5254 B standard for external retaining ring pliers
• Non-slip plastic handle for controlled grip during installation and removal
• Solid-style construction — no interchangeable tips to lose in the field

Compatibility

Designed as an OEM-style professional tool for use with external retaining rings in trade and industrial service applications.

Installation Notes

This tool is used by licensed trades and service technicians working on mechanical assemblies. Before servicing any component secured by a retaining ring, de-energize the equipment and follow applicable lockout/tagout procedures per OSHA and site safety requirements. Ensure the correct tip size is matched to the ring eyelet to prevent tip slippage or ring deformation. Eye protection is recommended during snap ring installation and removal, as rings can release under tension.