Anarchy Outdoors Bolt Knob Fluted 5/16x24 Black ABK-F-BLK. Specifications for Anarchy Outdoors Bolt Knob Fluted: Manufacturer: Anarchy Outdoors Additional Features: Fluted Style Threads per Inch: 5/16x24 Weight: 2 oz Features of Anarchy Outdoors Bolt Knob Fluted Dimensions: 1.5" x 7/8" x 7/8" All of our standard thread knobs will fit on the Christensen Arms Standard Rifles Package Contents: Anarchy Outdoors Bolt Knob Fluted Anarchy Outdoors ABK-F-BLK: Bolt Knob Fluted 5/16x24 Black