Pentair 3/8" Helical Split Lockwasher | U43-12SSZ

Pentair 3/8" Helical Split Lockwasher | U43-12SSZ

OEM Pentair U43-12SSZ 3/8" split lockwasher. Prevents loosening from vibration in XF, Dyna-Pro, and Dura-Glas pumps.

Features

• OEM Pentair replacement for secure fastening performance.
• Helical split design maintains tension under vibration.
• Corrosion-resistant stainless steel for long service life.

Description

The Pentair U43-12SSZ 3/8" Helical Split Lockwasher is a genuine OEM fastening component designed to keep bolts and screws securely tightened in high-vibration pool pump environments. Its split design applies continuous spring tension, preventing fasteners from loosening during operation.

Used across Pentair and Sta-Rite pump systems—including IntelliFloXF, WhisperFloXF, Max-E-ProXF, Dyna-Pro, and Dura-Glas models—this washer is essential for maintaining structural integrity and reliable performance.

Constructed from corrosion-resistant stainless steel, it withstands moisture, chemicals, and demanding pool conditions.

Pro Tip

Always replace lockwashers during reassembly—once compressed, they lose tension and won’t secure fasteners properly.

Installation Tips

Disconnect power before servicing. Install washer between bolt head and surface. Do not reuse compressed washers. Tighten to proper torque without overtightening.

We want you to have quick and easy access to warranty information for all the brands we carry. Please click on the links below to view each manufacturer’s warranty page:

• Pentair Warranty
  
• A&A (Pentair In-Floor) Warranty
  
• Fluidra Warranty (Zodiac / Jandy / Polaris / Caretaker)
  
• Paramount Warranty
  
• BlueSquare Warranty
  
• Hayward Warranty
  
• All Other Manufacturer Warranties
  

Note: Warranty coverage, registration, and service terms are provided directly by the manufacturer. Please review the details carefully to ensure proper understanding of coverage and claim procedures.