Gibraltar Z9478SET Spherical Washer Assembly 1-1/8 in

Product Description

The GIBRALTAR Z9478SET is a spherical washer assembly designed for use with 1-1/8 inch bolts. It consists of a matched male and female washer set that accommodates angular misalignment between a bolt head or nut and a non-perpendicular bearing surface. The female cup measures 1-1/4 inches inside diameter and 2-1/4 inches outside diameter. The male component measures 1-3/16 inches inside diameter and 2-1/4 inches outside diameter. Both pieces are manufactured from 12L14 case hardened steel with a black oxide finish, providing moderate corrosion resistance and a clean appearance. The assembly is 1/2 inch thick with a 3 inch radius. Millwrights, maintenance mechanics, and structural installers commonly specify this hardware on heavy equipment, structural connections, and industrial machinery.

This spherical washer assembly is suited for industrial and commercial maintenance applications where bolt loading occurs at an angle or where bearing surfaces are not perfectly square to the fastener axis. It is commonly used in structural steel connections, conveyor systems, heavy machinery mounts, and fabrication applications that require load distribution across a curved mating surface. The set ships as a single matched pair at a package quantity of one unit.

Key Features

• Accommodates angular bolt misalignment between fastener and bearing surface
• Case hardened 12L14 steel construction for strength and wear resistance
• Black oxide finish for moderate corrosion protection and reduced light reflection
• Matched male and female set: 1-1/4 inch and 1-3/16 inch inside diameters, 2-1/4 inch outside diameter on both pieces
• 1/2 inch assembly thickness with 3 inch spherical radius
• Fits 1-1/8 inch bolt diameter

Compatibility

Designed as a standard spherical washer set for 1-1/8 inch fastener applications requiring angular load compensation in industrial and structural assemblies.

Installation Notes

Installation is typically performed by millwrights or maintenance mechanics familiar with heavy fastener assemblies. De-energize and lock out any associated equipment before installing or replacing hardware under load. Ensure mating surfaces are clean and free of debris before seating the male and female components together. Consult applicable structural or equipment specifications for proper fastener torque requirements before final assembly.