FS4000-04 | Buna-N NBR Face Seal O-Ring | 90 Durometer Hydraulic Seal

Product Description

The FS4000-04 Buna-N NBR Face Seal O-Ring is engineered as a high-performance sealing component for SAE ORFS (O-Ring Face Seal) hydraulic fittings. Constructed from 90-durometer Buna-N (nitrile rubber), this O-ring provides excellent resistance to petroleum-based hydraulic fluids, mineral oils, and moderate temperatures while delivering consistent sealing performance under pressure.

Specifications

• Material: Buna-Nitrile (90 Durometer)
  
• Shape: O-Ring
  
• Nominal Size: 04
• Compatible with SAE ORFS hydraulic fittings
  

Features

• Durable Buna-N oil-resistant compound
  
• 90-durometer hardness for extrusion control
  
• Designed for ORFS face seal applications
  
• Provides leak-resistant hydraulic performance
  

Applications

• ORFS adapter and fitting sealing
  
• Hydraulic manifolds and hose assemblies
  
• Industrial and mobile fluid power systems
  
• OEM hydraulic circuits

These FS4000-04 O-ring ORFS face seals are designed to eliminate leaks at high pressure by compressing the O-ring against flat sealing surfaces on adapters and connectors. The FS4000-04 is suitable for smaller hydraulic circuits where compact fittings and efficient face sealing are required. Its optimized hardness balances durability with flexibility, maintaining seal integrity through repeated pressure cycles and vibration exposure.