In most cases, it is also very handy to know the different parts that make up a screw and the types of head and thread available, for information on this see our parts of a screw project here. The M Rating or M Measurement for Screws and Bolts

Notwithstanding any other provision of this Agreement, for the purposes of the Contracts (Rights of Third Parties) Act 1999 this Agreement is not intended to, and does not, give any person who is not a party to it any right to enforce any of its provisions.

Metric Imperial Screw Conversion Chart

although given in good faith, shall not form part of the Agreement and is given without any liability on the Company’s part. You agree and confirm that you do not and will not in good faith rely on such

ISO 68-1:1998 ISO general purpose screw threads – Basic profile – Part 1: Metric screw threads. International Organization for Standardization. The coarse pitch is the commonly used default pitch for a given diameter. In addition, one or two smaller fine pitches are defined, for use in applications where the height of the normal coarse pitch would be unsuitable (e.g. threads in thin-walled pipes). The terms coarse and fine have (in this context) no relation to the manufacturing quality of the thread.

Any recommendation or advice that the Company, its employees, representatives or agents, may give you (or may have given you) regarding the use or fitness of the goods for any purpose whatsoever, The length of a machine screw or bolt is indicated by an × and the length expressed in millimetres (e.g. M8-1.25×30 or M8×30). [ citation needed] Tables of the derived dimensions for screw diameters and pitches defined in ISO 261 are given in ISO 724. If you are struggling to find the best way to get your screw into whatever you are screwing, then have a look at our project that explains all about screwdrivers. Above we explain that the Gauge (imperial) happens to have a head which is approximately the same number (in mm). This is the equivalent of saying that the diameter in mm is approximately half the gauge (given what the formula above states).

The repaired or replacement goods will be delivered to the original place of delivery and are otherwise subject to the provisions of this Agreement. Property in and absolute ownership of any goods and the right of disposal of such goods that the Company sells to you shall not pass to you until you have paid the Company in full and including VAT allCompany have both signed an off-hire notice for that item and the item has been returned to the Company. A wood screw is sized by two different numbers. First is the Gauge of the screw which refers to the diameter – the larger the number, the larger the diameter. A number 4 screw is much smaller than a number 12 screw. The "M" designation for metric screws indicates the nominal outer diameter of the screw thread, in millimetres. This is also referred to as the "major" diameter in the information below. It indicates the diameter of smooth-walled hole that a male thread (e.g. on a bolt) will pass through easily to connect to an internally threaded component (e.g. a nut) on the other side. That is, an M6 screw has a nominal outer diameter of 6 millimetres and will therefore be a well-located, co-axial fit in a hole drilled to 6mm diameter.