For example, an ANSI Inch 2″ socket cap head bolt with a normal fit counterbored hole will require a pilot hole diameter of 2 1/8″, a counterbore diameter of 3 1/8″, and a counterbore depth of 2 1/16″.
Table of Contents
How do you size a counterbore?
For example, an ANSI Inch 2″ socket cap head bolt with a normal fit counterbored hole will require a pilot hole diameter of 2 1/8″, a counterbore diameter of 3 1/8″, and a counterbore depth of 2 1/16″.
How deep is a counterbore?
Counterbore Hole Size Chart for Socket Cap Head Fasteners (ISO 4762)
| Fastener Size | Pilot Hole Diameter (Close Fit H12) | Counterbore Depth |
|---|---|---|
| M4 | 4.3 | 4.8 |
| M5 | 5.3 | 5.8 |
| M6 | 6.4 | 6.8 |
| M8 | 8.4 | 8.8 |
What is the clearance for a counterbore pilot?
Important note: The clearance drill for the counterbore pilot is 9/32, not inch.
When drilling for a 1/2 socket head cap screw what size hole would you drill for a counterbore?
ANSI Hardware Design Guides ISO Metric Hardware Design Guides
| Nom. Size Screw | Nom. Size Screw Decimal | Nominal Drill Size A |
|---|---|---|
| 3/8 | 0.3750 | 25/64 |
| 7/16 | 0.4375 | 29/64 |
| 1/2 | 0.5000 | 33/64 |
| 5/8 | 0.6250 | 41/64 |
What size is a #10 drill bit?
What size is a #10 drill bit? Numbered drill bit gauge sizes range in ascending order from 80 (smallest) to 1 (largest). Thus, drill bit #10 is on the larger side of your standard drill set.
What size countersink bit for #10 screw?
Wood Screw Pilot Hole Sizes
| Screw Size | Hard Wood | Countersink Size |
|---|---|---|
| Tapered Bit | ||
| #9 | 3/16″ | 3/8″ |
| #10 | 13/64″ | 7/16″ |
| #12 | 7/32″ | 7/16″ |
What is the drill size for a 10 32 Tap?
| To Tap This Size Screw Or Bolt: | Use This Drill Bit: | (Closest Fractional:) |
|---|---|---|
| 10-32 NF | #21 | 5/32″ |
| 5mm-0.90mm | 4.2mm | – |
| 5mm-0.80mm | 4.3mm | – |
| 12-24 NC | #16 | 11/64″ |
What size is a #10 hole?
0.1590″
They have slightly different requirements for some screw sizes.
| Screw Size | Screw Threads per Inch | Recommended Hole Diameter |
|---|---|---|
| #10 | 12 | 0.1590″ |
| #12 | 11 | 0.1875″ |
| #14 / 1/4″ | 10 | 0.2188″ |
| 5/16″ | 9 | 0.2900″ |
What size is a #10 countersink?
Table for 82 Degree Countersink
| Screw Size | #4 | #10 |
|---|---|---|
| Max Head Dia. | 0.225 | 0.385 |
| Min Head Dia. | 0.207 | 0.359 |
| Top Ctsk Dia. | 0.216 | 0.372 |
| Body Dia. | 0.112 | 0.190 |
What size drill bit to pre drill for a #10 screw?
Drill Bit Sizes For Pre-Drilling For Screws Most Commonly Used Sizes In Bold
| Screw Size | Pilot hole size for hardwoods* | Pilot hole size for softwood** |
|---|---|---|
| #9 | 1/8″ | 3/32″ |
| #10 | 1/8″ | 7/64″ |
| #11 | 5/32″ | 9/64″ |
| #12 | 9/64″ | 1/8 |
Why is counterbore used?
A counterbore hole is usually used when the head of a fastener, such as a hex head or socket head capscrew, is required to be flush with or below the level of a workpiece’s surface. For a spotface, material is removed from a surface to make it flat and smooth, usually for a fastener or a bearing.
What tool is used to make a counterbore?
The back counterbore, or back spot facer as it is commonly known, is a versatile tool intended to go through a pre-bored hole to produce a counterbore on the backside of the hole.
What size is a 10 32 hole?
10-32 screws have a diameter of 3/16″ (4.8mm) where as 12-24 screws have a diameter of 7/32″ (5.6mm).
What size drill bit do I use for a 10 32 Tap?
US Tap and Drill Bit Size Table
| Tap | Fractional Drill Bit | Number Drill Bit |
|---|---|---|
| #10-24 | 5/32″ | 25 |
| #10-32 | 5/32″ | 21 |
| #12-24 | 11/64″ | 16 |
| 1/4″-20 | 13/64″ | 7 |
What size is a #8 countersink?
11/64 in.
The Milwaukee #8 Countersink features a 11/64 in. Drill Bit. The pre-drill and countersink bits are designed for use in Milwaukee Drill Drivers.