7/8'' (22.2 mm)

7/8 Inch (22.2 mm) Drill Center: Spec Reference and Hardware Guide

What the 22.2 mm spec means and where it applies

Seven-eighths of an inch converts to exactly 22.225 mm — catalogued as 22.2 mm throughout the hardware industry. That figure is not a standard drawer-pull center in the conventional sense; it identifies the screw-hole spacing on small-footprint hardware whose mounting posts sit close together by design. The pull face is inherently compact and proportionally suited to narrow drawer fronts and small door stiles without requiring a specific minimum width. Applications cluster around low-profile hardware: finger pulls on jewelry drawers, file drawers, and inset cabinet doors; recessed pulls that sit flush with the door face; edge-mounted hardware on built-in furniture where the pull is meant to register as quiet detail rather than a focal point. Custom millwork in dressing rooms, built-in wardrobes, and commercial display cases also uses this spacing for the same low-profile reason. Because the post spacing is too tight for through-bolt mounting on most cabinet thicknesses, fasteners at this size are screw-through-back rather than the post-and-bolt arrangement common on larger pulls. Products typically ship pre-paired with fasteners sized for the application, so confirming cabinet thickness against included fastener length is the most common installation check.

Sizing up, sizing down, and retrofit considerations — FAQ

Adjacent sizes frame where 22.2 mm fits in the spec ladder. Sizing down to 3/4 inch (19.05 mm) tightens the profile further and is generally limited to the smallest finger and edge pulls. Sizing up to 1 inch (25.4 mm) adds a few millimeters of post spread and, on thicker cabinet stock, begins to allow post-and-bolt mounting that is not viable at 22.2 mm. For standard drawer-pull sizing the nearest common reference point is 3 inch (76.2 mm). Cabinetmakers specifying 22.2 mm hardware typically do so at the design stage; most of these installations are designed into the cabinet build rather than sourced as replacements. **How do I measure a 7/8 inch drill center?** Place a ruler or calipers center-of-hole to center-of-hole across the two mounting holes. The correct reading is 7/8 inch, which equals 22.225 mm (catalogued as 22.2 mm). **Is 7/8 inch the same as 22 mm?** No. Twenty-two millimeters is a distinct metric size. Seven-eighths of an inch equals 22.225 mm; rounding it to 22 mm introduces a 0.225 mm error that can cause a misfit at installation. **Can I retrofit a 7/8 inch pull into an existing cabinet?** The tight post spacing limits retrofit viability. Before ordering, confirm that the existing hole pattern matches 22.2 mm center-to-center and verify cabinet thickness against the fastener length included with the hardware — the most common source of installation mismatch at this size.

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