Dewalt 910813 O-ring 40 X 1.3 Nitrile

Product Description

The DEWALT 910813 is a nitrile rubber O-ring sized 40 x 1.3, designed as a sealing component for DEWALT power tools and equipment. Nitrile (NBR) compounds are well suited to applications involving petroleum-based fluids, oils, and compressed air, making this O-ring a common wear item in pneumatic and hydraulic tool assemblies. Technicians servicing DEWALT equipment replace this part to restore pressure integrity and prevent fluid or air leakage at sealed joints. The dimensions — 40 mm inner diameter with a 1.3 mm cross-section — must be matched exactly to the mating groove to ensure a reliable seal.

This O-ring is used as an internal replacement component during routine maintenance or repair of DEWALT power tools and accessories. It is typically installed wherever the original sealing element has become worn, compressed, cracked, or chemically degraded. Proper replacement helps restore the tool to manufacturer specifications and prevents performance loss caused by internal leakage.

Key Features

• Nitrile (NB/NBR) rubber compound offers good resistance to oils, fuels, and compressed air environments
• 40 x 1.3 sizing must be matched precisely to the correct groove geometry for an effective seal
• Direct OEM replacement part for DEWALT equipment requiring this specific O-ring
• Compact cross-section suitable for tight tolerance sealing applications in power tool assemblies

Compatibility

Designed as an OEM replacement O-ring for DEWALT power tools and accessories requiring the 910813 sealing element. Verify the specific tool model and service manual to confirm fitment before installation.

Installation Notes

O-ring replacement should be performed by a qualified technician familiar with the tool being serviced. Before disassembly, disconnect the tool from its power source and depressurize any pneumatic lines or reservoirs. Inspect the mating groove for scoring or damage before installing the new O-ring, and apply a compatible lubricant to the O-ring to ease installation and reduce the risk of tearing. Avoid using sharp tools that could nick or cut the sealing surface during reassembly.

Technical Specifications

• O-Ring Size: 40 x 1.3
• Material: Nitrile Rubber (NBR)

Standard Information

• Brand: DEWALT
• Manufacturer Part Number: 910813