Gibraltar Z8846 M6 Extra Thick Flat Washer Black Oxide

Product Description

The GIBRALTAR Z8846 is an M6 extra thick flat washer manufactured from case-hardened 1010 steel with a black oxide finish. It measures 6.4 mm inside diameter, 18 mm outside diameter, and 4.5 mm thick, providing a wider bearing surface and greater load distribution than standard flat washers. The black oxide finish offers mild corrosion resistance and reduces light reflection in finished assemblies. This washer is suited for use by mechanical contractors, millwrights, electricians, and maintenance technicians working in commercial, industrial, and trade applications where added thickness and surface hardness are required at an M6 fastener location.

The Z8846 is appropriate for bolted connections where a standard washer would not provide adequate bearing surface or where joint relaxation under load is a concern. The extra thickness reduces the risk of washer deformation under high clamp loads. Typical installation scenarios include equipment mounting, panel attachment, and structural fastening in both new construction and retrofit work where metric fasteners are specified.

Key Features

• Extra thick profile at 4.5 mm provides greater load distribution than standard flat washers
• Case-hardened 1010 steel construction resists deformation under high clamp loads
• Black oxide finish delivers mild corrosion resistance and a clean appearance in finished assemblies
• M6 inside diameter for direct use with M6 screws and bolts without modification
• Metric dimensioning for use in metric-fastener applications across trade and industrial settings

Compatibility

Designed as an OEM-style replacement or service part for use with M6 metric screws and bolts in mechanical, electrical, and structural fastening applications.

Installation Notes

Installation requires no special tools beyond standard hand or power drivers used for the mating M6 fastener. Ensure mating surfaces are clean and free of debris before seating the washer to achieve proper clamp load. De-energize and lock out any electrical or mechanical system before servicing fastened connections on live equipment. Follow applicable codes and torque specifications set by the equipment manufacturer or governing installation standard for the application.