Gibraltar SP-4SS-G Spherical Washer Assembly 3/4 in

Product Description

The GIBRALTAR SP-4SS-G is a stainless steel spherical washer assembly designed for use with 3/4 inch fasteners. The assembly consists of matched male and female spherical seat components that self-align under load, compensating for minor angular misalignment between a bolt and its mating surface. Machined from 303 grade stainless steel, the assembly provides corrosion resistance in exposed or wet service environments. Inside diameter is 25/32 inches, outside diameter is 1-5/8 inches, thickness is 3/8 inches, and the spherical radius is 2-1/4 inches. Installed by maintenance mechanics, millwrights, and industrial tradespeople where rigid flat washers would introduce side load stress on fastener shanks.

Spherical washer assemblies like the SP-4SS-G are used in structural bolting, machinery mounting, conveyor frames, and general industrial fastening applications where mating surfaces are not perfectly parallel. The self-aligning geometry distributes clamp load evenly across the bearing face, reducing fastener fatigue. The 303 grade stainless steel construction makes this assembly suitable for food processing, marine, chemical, and other environments where carbon steel hardware would corrode. This is a single-pair assembly packaged as one unit.

Key Features

• Self-aligning spherical seat compensates for angular misalignment between bolt and bearing surface
• 303 grade stainless steel construction for corrosion resistance in wet and chemical environments
• 25/32 inch inside diameter fits standard 3/4 inch bolt shanks
• 1-5/8 inch outside diameter provides broad load bearing surface
• 2-1/4 inch spherical radius allows even clamp load distribution under angled loading
• 3/8 inch assembled thickness suits standard bolt-length calculations for 3/4 inch fastener systems

Compatibility

Designed for use with 3/4 inch diameter bolts as an OEM-style or replacement spherical washer assembly in industrial and structural fastening applications requiring self-aligning bearing surfaces.

Installation Notes

Installation is performed by qualified mechanics or tradespeople using standard hand and torque tools appropriate for 3/4 inch fastener systems. De-energize or lock out any equipment before replacing fastener hardware on live machinery per applicable OSHA lockout/tagout procedures. The male component seats into the female component before the bolt is inserted — confirm proper nesting and orientation before torquing. Do not substitute this assembly in structural connections without verifying load ratings against engineering specifications for the application.