Stewart Fastener 25WLZ 1/4 Inch Lock Washer

Product Description

The STEWART FASTENER 25WLZ is a 1/4 inch lock washer designed to maintain fastener tension in bolted assemblies subject to vibration, thermal cycling, or dynamic loads. Lock washers of this type are installed under a nut or bolt head to resist loosening over time. The 25WLZ fits standard 1/4 inch fastener hardware and is a staple component in mechanical, electrical, HVAC, and plumbing installations where joint integrity is critical.

This lock washer is suited for use across residential and commercial trade applications. HVAC technicians, electricians, plumbers, and pipefitters rely on split-type lock washers during equipment mounting, panel assembly, and pipe support installations. The 1/4 inch size is one of the most commonly specified in light mechanical fastening and equipment enclosure work.

Key Features

• 1/4 inch nominal size for standard 1/4 inch bolt or screw assemblies
• Split-ring lock washer design provides spring tension to resist vibration-induced loosening
• Compact profile fits standard hardware and enclosure fastening applications
• Compatible with nuts, hex bolts, and machine screws in the 1/4 inch class

Compatibility

Designed as a standard 1/4 inch lock washer for use with 1/4 inch fastener hardware in general mechanical, electrical, HVAC, and plumbing assemblies.

Installation Notes

Lock washers are installed by placing the washer onto the bolt shank before threading the nut, positioning the split ring between the fastener head or nut and the mating surface. Always de-energize electrical equipment and shut off relevant systems before working in areas requiring fastener service. Follow applicable codes including NEC for electrical assemblies and IFGC or IPC for mechanical systems. Do not reuse lock washers that have been fully compressed flat, as they lose their locking effectiveness.

Technical Specifications

• Nominal Size: 1/4 inch
• Type: Lock Washer

Standard Information

• Brand: STEWART FASTENER
• Manufacturer Part Number: 25WLZ