Nuts and bolts

[benny3008]

Im having trouble understanding the measurements used on some nuts and bolts i need to buy online, the nut is said to be M10....What does this mean? And how will the measurements for a bolt be laid out?

[society]

Hi Benny, did you get your license yet?

[benny3008]

Nope, my tet has been cancelled again and moved forward to the end on february, i was meant to be taking it in 2 weeks! :-(

[NazNomad]

http://www.roymech.co...Screws/Hex_Screws.htm

An M10 bolt would require a 10mm hole.

As fully explained in ISO 965-1, Sect. 5, metric fastener size designations always begin with capital M or MJ followed by fastener nominal diameter and thread pitch, both in units of millimeters (mm), separated by the symbol "x", as follows. M10 x 1.5-6g-S means metric fastener thread profile M, fastener nominal size (nominal major diameter) 10 mm, thread pitch 1.5 mm, external thread tolerance class 6g, and thread engagement length group S ("short"). If referring to internal thread tolerance, "g" would be capitalized. A fit between threaded parts is indicated by internal thread tolerance class followed by external thread tolerance class separated by a slash; e.g., M10 x 1.5-6H/6g.

[scotman]

Benny

Following on from Naz's post.

As stated M10 refers to nuts and bolts which have a nominal 10mm diameter.
The standards which define these allow 2 types of thread pitch per diameter. These are usually referred to as 'coarse pitch' and 'fine pitch'.
The standard for metric bolts is to use the coarse pitch and, if nothing is stated otherwise, you can assume this is what is meant.