What is the clearance hole for an M3 screw?
3.2 mm
For examples, the clearance hole for a M3 screw has 3.2 mm or 3.5 mm diameter. the clearance hole for a M4 screw has 4.2 mm or 4.5 of diameter.
What is the hole size for M8 bolt?
Metric clearance and tapping drill hole sizes.
| Size | Clearance Hole mm | Tapping Drill (fine pitch) |
|---|---|---|
| M5 | 5.5 | |
| M6 | 6.5 | 5.25 mm |
| M8 | 9 | 7 mm |
| M10 | 11 | 9.0 or 8.75 mm |
What size hole is M10?
Tap Size
| Tap Size | Drill Size |
|---|---|
| M9 x 1.25 | 7.9mm |
| M10 x 1 | 9.1mm |
| M10 x 1.25 | 8.9mm |
| M10 x 1.5 | 8.4mm |
Should threads go through a clearance hole?
Generally, you should always drill a clearance hole when using fully-threaded screws to join tough materials (such as hardwood or metal). Partially-threaded screws do not require a clearance hole because they have a smooth shank underneath their head, which doesn’t have any threads on.
How is clearance hole calculated?
The LMC clearance hole also can be calculated by adding the diameter of the fastener and the diameter of the fastener head and then dividing the sum by two. This method of selecting the LMC clearance hole size is a rule of thumb that will yield the largest hole that will fit under the head of the fastener.
What is the typical clearance hole for a 5/16 bolt?
CLEARANCE HOLE CHART
| Clearance Hole Chart for Inch Fasteners | ||
|---|---|---|
| Nominal Screw Size | Fit Class – Normal | Fit Class – Close |
| 5/16 | 11/32 | 0.328 |
| 3/8 | 13/32 | 0.391 |
| 7/16 | 15/32 | 0.453 |
How big should a clearance hole be?
CLEARANCE HOLE CHART
| Clearance Hole Chart for Inch Fasteners | ||
|---|---|---|
| Nominal Screw Size | Fit Class – Normal | |
| 5/16 | 11/32 | 0.354 |
| 3/8 | 13/32 | 0.416 |
| 7/16 | 15/32 | 0.479 |
What does M8 1.25 mean?
For metric fasteners, you will see a M8 x 1.25 or an M8 x 1. For thread pitch, the distance between two points is the second number meaning the higher the number the fewer threads there are. This means the M8 x 1.25 is the coarse threading and the M8 x 1 is the fine thread.
Is M10 same as 10mm?
If the size is M10 x 25, that would mean that the diameter is 10 mm. The 25 indicated a length of 25 mm. A matching nut would be labeled M10, which also doesn’t require a thread pitch since it’s a course thread fastener.
What are clearance holes for?
A clearance hole is a hole through an object which is big enough to enable threads of a screw or bolt to pass through but not the head of the screw or bolt. It allows a screw to pass through it without the threads biting into the material.
How much bigger should a hole be than a bolt?
Select a drill bit 1/32 inch larger than the bolt diameter for a tight fit hole or a drill bit 1/16 inch greater than the bolt diameter for a loose fitting hole.
How do you calculate clearance hole size?