Anarchy Outdoors Bolt Knob Acorn Style Aluminum Black ABK-ACR-BLK. Specifications for Anarchy Outdoors Bolt Knob Acorn Style: Manufacturer: Anarchy Outdoors Finish: Anodized Condition: New Additional Features: Acorn Style Threads per Inch: 5/16x24 Features of Anarchy Outdoors Bolt Knob Acorn Style Dimensions: 1.5" x 7/8" x 7/8" Package Contents: Anarchy Outdoors Bolt Knob Acorn Style Anarchy Outdoors ABK-ACR-BLK: Acorn Style Bolt Knob Aluminum Black