Electro Hardware RS-3 Split Lock Washer No. 8 302 Stainless Steel

Product Description

The ELECTRO HARDWARE RS-3 is a No. 8 split lock washer manufactured from 302 stainless steel. Split lock washers are installed under fastener heads or nuts to resist loosening caused by vibration and torque relaxation. The RS-3 carries an inside diameter of 0.146 inches, an outside diameter of 0.328 inches, and a thickness of 0.012 inches. The 302 stainless steel construction provides corrosion resistance suitable for wet, humid, or chemically active environments. Licensed trades and maintenance professionals install these washers in HVAC equipment panels, electrical enclosures, plumbing fixtures, and pool equipment assemblies where fastener retention under vibration is required.

The RS-3 is sized for No. 8 screws with a thread size of No. 8-32. It is appropriate for both indoor and outdoor applications where stainless steel is specified to resist rust and oxidation. Common installation scenarios include sheet-metal panel assembly, motor mounting, junction box cover retention, and any bolted connection subject to repeated vibration cycles. This washer does not meet military specifications and is intended for commercial and light industrial fastening applications.

Key Features

• 302 stainless steel construction resists corrosion in wet and humid environments
• Split-ring design applies continuous spring tension to resist fastener back-off under vibration
• Inside diameter of 0.146 inches fits No. 8 screw shafts
• Thickness of 0.012 inches provides consistent clamp load in tight-clearance assemblies
• Outside diameter of 0.328 inches suits standard No. 8 fastener bearing surfaces
• Inch measurement system for direct compatibility with standard SAE fastener hardware

Compatibility

Designed as an OEM-style replacement or standard-fit split lock washer for No. 8-32 fasteners used in residential and commercial HVAC, electrical, plumbing, and pool equipment assemblies.

Installation Notes

Install with the split ends bearing against the fastener head or nut and the mating surface before torquing. Power down or de-energize any equipment before disassembling panels or covers. Use calibrated hand tools appropriate to the fastener drive type. Follow applicable NEC or equipment manufacturer guidelines when reassembling electrical enclosures.