Modern spanner sizes refer to the distance across the flats of the hexagonal nut or bolt they would fit. A 17mm spanner therefore fits a nut 17mm across its flats and this is normally a nut to fit a 10mm diameter bolt (M10).
How do I know what size spanner wrench to get?
Spanner wrenches come in various sizes from 4 inches to 18 inches in length.To determine what size spanner wrench you have, measure from the end of the handle to the edge of the fixed side of the vise. Some spanner wrenches have the size printed on the handle.
What size spanner do I need for a M8 nut?
13mm
Metric Spanner Sizes
| Nominal Size | Spanner Size |
|---|---|
| M6 | 10mm |
| M7 | 11mm |
| M8 | 13mm |
| M10 | 17mm |
What size wrench is needed for a 1 nut?
US Bolt Head/Wrench Size
| Bolt Diameter | Head and Wrench Size | |
|---|---|---|
| Hex Bolt – Lag Bolt – Square Bolt | Heavy Hex Bolt | |
| 1″ | 1-1/2″ | 1-5/8″ |
| 1-1/8″ | 1-11/16″ | 1-3/4″ |
| 1-1/4″ | 1-7/8″ | 2″ |
What are the most common spanner sizes?
BA sizes are the most likely to crop up in old electronic equipment and if you are working with this sort of device you may wish to purchase sizes 2BA (jaw size of 8.2mm) and 4BA (jaw size of 6.3mm), as they are the most common.
How many spanner sizes are there?
Metric Spanner Sizes
| Nominal Size | Spanner Size |
|---|---|
| M10 | 17mm |
| M12 | 19mm |
| M14 | 22mm |
| M16 | 24MM |
What size bolt takes a 1/2 wrench?
Hex Bolt, Lag Bolt, Square Bolt and Heavy Hex Bolt
| US Bolts | ||
|---|---|---|
| Bolt Diameter (in) | Head and Wrench Size (in) | |
| 7/16 | 5/8 | |
| 1/2 | 3/4 | 7/8 |
| 9/16 | 13/16 |
What does AF mean in spanner size?
When you see a spanner marked AF, it stands for Across Flats but is actually an Imperial size inscription or more specifically an SAE marking which is associated with UNF and UNC screw threads. For instance, a 1/2 inch AF spanner means it is a ½ inch across and can fit in a 5/17 inch UNF nut’s diameter.
What M size is a 15mm nut?
The standard wrenches needed are: 11,13,15,17,19,22,24,27,30,32,36mm. I believe that the bold that goes with the 15mm wrench is normally an M8. M8s usually use 12 or 13mm heads.
What size nut goes on a 1/2 inch bolt?
US Nut Size Table
| Size | Diameter* | |
|---|---|---|
| Hex Nut | Machine Screw Nut | |
| 1/2″ | 3/4″ | – |
| 9/16″ | 7/8″ | – |
| 5/8″ | 15/16″ | – |
How to find spanner size from bolt diameter?
Following formula are used to calculate spanner size – For bolt size upto M14 Spanner Size = (Bolt Size * 1.5) + 1 Example for M12 bolt, Spanner Size = (Bolt Size * 1.5) + 1 = (12 * 1.5) + 1 = 18 + 1 = 19
How big is a bolt size for a nut?
There is a range of bolt sizes in which the nut size is 1.5 x bolt diameter, but this is not consistent in small and large sizes, so one must consult literature rather than attempt to calculate. How you doing? I think I might have read the question wrongly. I am guessing when I say the UK metric size for 13 mm/ ½” nut is ~ ¼”.
How big of a nut does a 1 / 2 inch wrench fit?
In the US, a 1/2 inch wrench fits a 1/2 inch nut — you’ll never convince mechanics otherwise. With respect to wrenches, the nut size is the dimension across flats. However, a 1/2 inch nut (measured this way) actually fits a 5/16 bolt or stud (which is measured on the diameter).
How big is a 3.4 inch nut?
I think you may have gotten confused somewhere along the line. Are are you referring to the shaft of the bolt as ½” so the ‘head’ of the bolt will be 22 mm? Good luck. Unless it is an extra heavy nut, the standard size of nut for 1/2-inch bolts is 3/4 inch ≈ 19 mm.
