here’s a handy table for bolts and nuts with basic dimensions and spanner sizes etc, it covers Australian standard metric fasteners, so sorry rest of the world, the spanner sizes may be slightly different for you.
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common bolt and fastener spanner size table By admin, on September 10th, 2009
4 comments to common bolt and fastener spanner size table |
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September 10th, 2009 | 
can you please assist me with what spanner i need to use for a size m36 bolt
Hi Pedro, that would be a 55mm head size.
Hi
Can you please assit me with what size spanner in need for a M30 nut?
Also does this change if I’m using Grade 4.6 Nut or a Grade 8.8?
Hi Evan
You need a 46mm spanner for that size which is the same for any grade of steel.