Whitney Tool 20564 — SP C'bore M42 4mm Screw Size 4.5mm Pilot Dia., 9.525mm SH.
Metric Solid Pilot Cap Screw Counterbore, 4MM Screw Size, 4.5MM Pilot Dia., 9.525MM Shank M42
- Shank Diameter: 3/8"
- Material: M42 Cobalt
- Coating: No Coating
- WTC No: CBSP08045M42
Part of the Whitney Tool Cap Screw – Metric series (Counterbores). Made in Bedford, Indiana, USA.

