5/16"-30 UNS X 1-1/2" OD HSS Round Adjustable Die BoltsandNuts.com Part Number: Assortment Kit #530575

Part Number: Assortment Kit #530575 Pieces - Coarse Thread

Size 3/8"-12

The smaller flat end keys are made from 8660 nickel chromium molybdenum steel that's heat-treated to 54–58 HRC and the larger flat end keys are made from 6150 chromium vanadium steel that's heat-treated to 44–50 HRC

Flute Length 1/2"

Narrow rectangular swivel pads are more compact than round ones

5/16"-30 UNS X 1-1/2" OD HSS Round Adjustable Die BoltsandNuts.com Part Number: Assortment Kit #530575Product Description HSS Round Dies are for use in making new threads or re threading existing threads. They are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Round dies are chamfered on both faces, one side has a 2 to 3 thread chamfer for threading and the other side has a 1 to 1 1 2 thread chamfer for threading close to a shoulder. Adjustments are made by a fine pitch screw which