Manufacturer Part Number: JN-149-M|Accessory Type|Jaw NutProduct Compatibility|8 in Kitagawa Chuck B-8; 8 in Matsumoto ChuckMaterial|Chuck Diameter Compatibility (mm)|Chuck Diameter Compatibility (Decimal Inch)|8.0000Thread Size|M12Screw Size (mm)|12.00Screw Size (Inch)|Screw Size (Decimal Inch)|Mount Type|Outside Diameter (mm)|Outside Diameter (Decimal Inch - 4 Decimals)|Outside Diameter (Inch)|Serration Dimensions|0.0591 x 60 degrees; 1.5 mm x 60 degreesDistance Between Mount Hole Centers (Decimal Inch)|1.0000Distance Between Mount Hole Centers (mm)|Groove Width (Decimal Inch)|0.5490Product Length (Decimal Inch)|Product Length (Inch)|1-7/8Product Width (Inch)|Product Height (mm)|Req'd # of Studs for Chuck|Product Height (Inch)|0.9700Product Width/Diameter (Decimal Inch)|0.8070Number Of Pieces|3Distance Between Mount Holes (Fractional Inch)|1UNSPSC Code|