ARO Y325-15 Nitrile / Buna-N O-Ring | Genuine Pump Service Component

ARO Y325-15 Nitrile O-Ring

The ARO Y325-15 is a replacement Nitrile / Buna-N O-ring used in compatible ARO pneumatic equipment and pump assemblies.

Official ARO parts documentation specifies the seal as 1/16 inch cross-section x 11/16 inch outside diameter.

Nitrile / Buna-N Construction

The Y325-15 is manufactured from Nitrile, also commonly referred to as Buna-N or NBR.

This elastomer is widely used for industrial sealing applications, but suitability depends on the actual fluid, lubricant, pressure, temperature and operating environment.

Verified Dimensions

• Cross-section: 1/16 inch
• Outside diameter: 11/16 inch

These dimensions should be matched together with the ARO part number during replacement selection.

Used Across Multiple ARO Applications

The Y325-15 is documented in multiple ARO service applications rather than one single pump model.

Official ARO piston-pump manuals list Y325-15 in applicable assemblies, while ARO pneumatic-tool documentation also uses the same O-ring inside certain valve housings.

For that reason, verify the complete equipment model and parts diagram before ordering.

Service and Repair Use

The O-ring may be supplied individually or as part of an applicable ARO service kit. When multiple seals show wear, a complete service kit may provide a more comprehensive repair option.

Inspection During Maintenance

Replace the O-ring if inspection shows:

• Cuts or abrasion
• Flattening
• Cracking
• Hardening
• Swelling
• Chemical deterioration

Clean and inspect the O-ring groove and mating surfaces before installing the replacement seal.

Ordering Guidance

Before purchasing, verify:

• ARO part number Y325-15
• Complete equipment model
• Nitrile material requirement
• 1/16 inch x 11/16 inch OD dimensions
• Required maintenance quantity

Using the exact ARO part number helps reduce the risk of selecting another similar Y325-series O-ring with different dimensions.