Christensen Large Fluted Bolt Knob Spiral Fluted Tactical Large Profile These Knobs are made of 7075 T6 Aircraft Grade Aluminum 1.6″Long 0.990″ Major Diameter Tapered up from a 0.405″ diameter at the threads They feature 5/16-24tpi threads that are 0.650″ deep with a .100″ recess These also feature 8 Spiral flutes for superior grip while not snagging BOLT KNOBS
