Jergens 41103 Spherical Washer Assembly 5/16 in Steel

Product Description

The JERGENS 41103 is a black oxide steel spherical washer assembly designed for use with 5/16 inch bolts. It consists of a matched male and female washer pair that allows angular misalignment between a bolt head or nut and a mounting surface, distributing load more evenly and reducing stress concentrations. The female seat has a 23/64 inch inside diameter and 3/4 inch outside diameter. The male seat has an 11/32 inch inside diameter and 3/4 inch outside diameter. Overall thickness is 7/32 inch with a 1 inch radius. The black oxide finish provides mild corrosion resistance in dry indoor environments. This assembly is installed by maintenance technicians and mechanical contractors working on structural or machine fastening applications.

Spherical washer assemblies are used where bolt axes are not perfectly perpendicular to the clamped surface, such as in structural steel connections, machinery bases, and fabrication fixtures. The self-aligning geometry compensates for angular misalignment up to the design limit of the assembly, preventing uneven bearing loads that can lead to fastener fatigue or loosening. This assembly is suited for light-duty industrial and mechanical applications requiring a compact 5/16 inch bolt fitment with a 1 inch spherical radius.

Key Features

• Self-aligning spherical seat pair compensates for angular bolt misalignment
• Black oxide steel construction for indoor corrosion resistance
• 5/16 inch bolt size with 23/64 inch female and 11/32 inch male inside diameters
• 3/4 inch outside diameter on both male and female seats
• 7/32 inch overall thickness for compact fastening envelope
• 1 inch spherical radius for consistent load distribution

Compatibility

Designed as an OEM-style replacement or maintenance stocking item for applications using 5/16 inch bolts requiring spherical washer alignment. Chamfer dimension of 23/64 inch is consistent with standard 5/16 inch bolt head bearing geometry.

Installation Notes

Installation is typically performed by mechanical technicians or millwrights using standard hand tools. Orient the concave female washer against the fixed surface and the convex male washer against the bolt head or nut, then torque the fastener to the specification required by the parent assembly design. Do not mix this assembly with washers of different radii, as mismatched spherical seats will not seat correctly. Inspect mating surfaces for burrs or debris before assembly to ensure proper seating and load transfer.