CAMVATE 3/8"-16 Female/Male & 1/4"-20 Female/Male Thread Screw Reducer 1 pc of 1/4"-20 female thread to 3/8"-16 male 1 pc of 3/8"-16 female thread to 1/4"-20 male 1 pc of 3/8-16 to 1/4"-20 Female to Female Thread Adapter