| 16 Pitch Worm-Ground Thread  | 
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| Material: 303 Stainless Steel. Right Hand Quality No. 8 KCS-H1 use with single thread wheel (14-1/2 degree P.A.) KCS-H2 use with double thread wheel (20 degree P.A.) KCS-H3 use with four thread wheel (25 degree P.A.) | |