Value Collection 31326 Split Lock Washer 5/16 in Grade 5

Product Description

The VALUE COLLECTION 31326 is a split lock washer designed for use with 5/16-inch screws and bolts. Made from Grade 5 steel with a zinc-plated finish, this washer provides corrosion resistance and mechanical locking action under fastener loads. The split design bites into both the fastener bearing surface and the mating material to resist loosening caused by vibration or dynamic loading. With an inside diameter range of 0.314 to 0.322 inches and a maximum outside diameter of 0.583 inches, it meets standard dimensional requirements for 5/16-inch fastener assemblies. Thickness is 0.078 inches. Installers across mechanical, HVAC, plumbing, and electrical trades use this type of washer in equipment panels, brackets, and structural connections.

This split lock washer is suited for general fastener assemblies in residential and light commercial applications. It is appropriate wherever a 5/16-inch fastener requires anti-loosening hardware, including equipment mounting, conduit supports, panel brackets, and mechanical enclosures. The zinc-plated finish provides basic corrosion protection in dry to mildly humid indoor environments. Sold individually with a minimum order quantity of 250 pieces.

Key Features

• Grade 5 steel construction for adequate tensile strength in standard fastening applications
• Zinc-plated finish provides corrosion resistance for indoor and sheltered installations
• Split lock design resists loosening under vibration and dynamic loads
• Inside diameter range of 0.314 to 0.322 inches fits standard 5/16-inch fasteners
• Maximum outside diameter of 0.583 inches and thickness of 0.078 inches meet common dimensional standards
• Inch measurement system; does not meet military specifications

Compatibility

Designed for use with standard 5/16-inch screws and bolts in general mechanical and trade fastening applications.

Installation Notes

Install between the fastener head or nut and the mating surface with the split ends facing the fastener bearing surface. Tighten fasteners to the torque specification required by the application or governing code. Power down or de-energize any equipment before servicing fastened assemblies in electrical or HVAC panels. Do not reuse lock washers that have been fully compressed flat, as locking effectiveness is reduced.