Dewalt d21259 O-ring 12 90 Durometer

Product Description

The DEWALT d21259 is a replacement O-ring rated at 90 durometer hardness, sized for use in DEWALT power tool assemblies. O-rings at this durometer rating provide firm resistance to compression and deformation under pressure, making them suitable for sealing applications where fluid or air containment is required. This part is installed by service technicians performing maintenance or repair on compatible DEWALT power tools and accessories. The 90 durometer Shore A hardness indicates a relatively firm elastomeric compound appropriate for mechanical and pneumatic sealing environments.

This O-ring is intended for use in DEWALT power tool repair and maintenance applications. It fits into sealing grooves within tool housings or internal assemblies where a size 12 O-ring with 90 durometer hardness is specified. Technicians servicing DEWALT tools in shop or field environments will install this part during routine seal replacement or after seal failure is identified during inspection.

Key Features

• 90 durometer Shore A hardness for firm, reliable compression sealing
• Size 12 O-ring profile for drop-in replacement fitment
• OEM DEWALT part for use in power tool repair and service
• Resists deformation under mechanical and pneumatic pressure

Compatibility

Designed as an OEM-style replacement O-ring for compatible DEWALT power tool assemblies requiring a size 12, 90 durometer seal.

Installation Notes

Installation should be performed by a qualified service technician. Disconnect and de-energize the tool completely before disassembling any internal components. Inspect the sealing groove for damage or debris before seating the new O-ring, and avoid using sharp tools that could nick or cut the elastomer during installation.

Technical Specifications

• O-Ring Size: 12
• Durometer Hardness: 90 Shore A

Standard Information

• Brand: DEWALT
• Manufacturer Part Number: d21259