Value Collection 33564 Split Lock Washer 1/2 in Grade 5

Product Description

The VALUE COLLECTION 33564 is a Grade 5 steel split lock washer sized for 1/2 inch screws and bolts. Split lock washers are installed under a nut or bolt head to resist loosening caused by vibration and torque relaxation. The 33564 is uncoated carbon steel, providing standard corrosion resistance suitable for interior and protected applications. Inside diameter runs 0.502 to 0.512 inches, outside diameter reaches a maximum of 0.879 inches, and the washer measures 0.151 inches thick. Licensed tradespeople and general contractors use these washers in mechanical, structural, and equipment-mounting assemblies wherever fastener retention under dynamic load is required.

This split lock washer is appropriate for use in residential and light commercial construction, HVAC equipment mounting, electrical panel and conduit hardware, plumbing equipment fastening, and general mechanical assemblies. It is compatible with 1/2 inch fastener hardware in inch-measurement systems. The uncoated finish makes it best suited for dry or controlled indoor environments, though it may also be used in briefly exposed conditions where a protective finish is applied after assembly.

Key Features

• Grade 5 steel construction provides solid strength for standard mechanical fastening applications
• Split-ring design bites into mating surfaces to resist vibration-induced loosening
• Inside diameter of 0.502 to 0.512 inches fits standard 1/2 inch fasteners
• Maximum outside diameter of 0.879 inches suits typical 1/2 inch bolt-head clearances
• 0.151 inch thickness delivers consistent load distribution across the washer face
• Uncoated finish allows for post-assembly coating or use in clean, dry environments

Compatibility

Designed for use with 1/2 inch screw and bolt fasteners in inch-measurement assemblies. Suitable for standard hex bolts, hex cap screws, and machine screws with a 1/2 inch nominal diameter.

Installation Notes

Installation is performed by placing the split lock washer on the fastener shank before seating the nut or bolt head against the mating surface. Ensure the mating surfaces are clean and free of debris before assembly so the washer can seat properly. Do not reuse split lock washers that have been fully flattened, as they will no longer provide effective locking force. Follow applicable codes and equipment manufacturer torque requirements for the fastener being used.