Specification Brand : Star USA ItemName : Circular Pitch Knurls - "A" Series 3/4 Dia. x 3/8 Width x 1/4 Hole Dia. / 50 TPI / Straight ItemTypeKeyword : knurled-knobs Manufacturer : Star USA PartNumber : 61512673318 ProductDescription : HIGH SPEED Circular Pitch Knurls are made to extremely high standards from the finest materials available. Knurls are individually hob cut and lapped to a smooth hard finish to give longer life and impart a smooth clean surface to the knurled part. ProductSiteLaunchDate : 2011-09-07T18:06:47.192Z Style : Compact