Value Collection 81923799 Split Lock Washer 5/16 in Grade 2

Product Description

The VALUE COLLECTION 81923799 is a Grade 2 steel split lock washer sized for 5/16 inch screws and fasteners. Split lock washers apply spring tension under a fastener head or nut, resisting loosening caused by vibration and thermal cycling. This washer carries a zinc plated finish for basic corrosion resistance in general-duty applications. The inside diameter ranges from 0.314 to 0.322 inches and the outside diameter ranges from 0.489 to 0.586 inches, with a nominal thickness of 0.078 inches. Electricians, plumbers, HVAC technicians, and general mechanical trades use split lock washers as a standard fastener hardware component in panel, bracket, and equipment assembly work.

This washer is suited for residential and light commercial mechanical assemblies where a 5/16 inch fastener is specified and basic vibration resistance is required. Common applications include securing electrical enclosures, HVAC equipment panels, plumbing brackets, and structural hardware where Grade 2 steel is acceptable for the load and environment. The zinc plated finish provides a degree of protection in dry to mildly humid indoor environments.

Key Features

• Grade 2 steel construction provides adequate strength for general-duty fastener assemblies
• Zinc plated finish offers basic corrosion resistance for indoor and dry-environment use
• Split lock design applies spring tension to resist fastener loosening under vibration
• Inside diameter range of 0.314 to 0.322 inches fits standard 5/16 inch screws and bolts
• Outside diameter range of 0.489 to 0.586 inches suits standard 5/16 inch fastener clearance holes
• Nominal thickness of 0.078 inches for consistent seating under fastener heads and nuts

Compatibility

Designed as a standard split lock washer for use with 5/16 inch screws and bolts in inch-measurement fastener assemblies requiring Grade 2 steel.

Installation Notes

Install split lock washers between the fastener head or nut and the mating surface before torquing. Ensure the washer seats flat with the split ends contacting both surfaces before final tightening. Follow applicable mechanical or electrical codes when assembling equipment panels and enclosures. Do not reuse split lock washers that have been fully compressed flat, as they will no longer provide effective spring tension.