METRIC CLEARANCE HOLE CHART. Metric clearance hole chart for metric bolts and screws according to ASME B18.2.8. M2 Clearance Hole : Close fit: 2.2 mm, Normal fit: 2.4 mm , Loose fit: 2.6 mm. M3 Clearance Hole : Close fit: 3.2 mm, Normal fit: 3.4 mm , Loose fit: 3.6 mm. M4 Clearance Hole : Close fit: 4.3 mm, Normal fit: 4.5 mm , Loose fit: 4.8 mm

Metric thread drill and tap chart with detailed information on tap drill sizes and thread sizes.

Nov 8, 2021 · Use the below bolt hole clearance chart for Metric size bolts and screws. This table shows how to determine the clearance hole size for a bolt. For example, an M3 bolt with a medium fit would have a 3.4 mm clearance hole.

Sep 14, 2024 · For example, an M12 screw requires a clearance hole of 13.5 to 13.77 mm for a normal fit. The clearance hole size is always slightly larger than the nominal thread size to accommodate manufacturing tolerances and ensure smooth assembly.

The recommended drill and hole sizes for metric fasteners are tabulated in this table calculator

Use these tables for calculating the relevant size drill bit and clearance hole for ISO metric coarse and fine threads.

The minimum recommended hole is the drill size and the maximum recommended hole size is based on standard tolerances. The hole sizes for metric fasteners are in agreement with ISO 273, Fasteners-Clearance Holes for Bolts and Screws, except …

A through hole or clearance hole for a screw is a common design in fastening technology. It allows the screw to pass through the workpiece to make a connection on the opposite side. The through hole has a specific size that aims to adequately accommodate the screw and ensure a stable connection.

Hard wood and soft wood pilot holes, shank clearance holes and countersink diameters. Taps and drill sizes used for Whitworth - ISO 7 and ISO 228 threads. Allowable withdrawal load force. The Engineering ToolBox provides a wide range of free tools, calculators, and information resources aimed at engineers and designers.

How to read the chart – An M8 bolt with a normal fit should have a 9 mm clearance hole. Imperial clearance hole chart. A clearance hole is a hole drilled through a component to allow a bolt to pass through. Use this table to determine the clearance hole size for metric bolts.