The 121-22818 is a 7/16''-18 HS bottom tap, categorized as a special H.S.S. machine screw and fractional tap.
Bottom taps are typically used to cut or finish internal threads in holes where threading close to the bottom of a blind hole is required.
- Model: 121-22818
- Size: 7/16''-18
- Type: HS bottom tap
- Category: Special H.S.S. bottom tap (779)
