If, on the rare occasion we have delivered you faulty, incorrectly supplied or defective goods, Metro Fixings will arrange a collection, repair or replacement and delivery service free of charge. In an external (male) thread (e.g. on a bolt), the major diameter D maj and the minor diameter D min define maximum dimensions of the thread. This means that the external thread must end flat at D maj, but can be rounded out below the minor diameter D min. Conversely, in an internal (female) thread (e.g. in a nut), the major and minor diameters are minimum dimensions; therefore the thread profile must end flat at D min but may be rounded out beyond D maj. In practice this means that one can measure the diameter over the threads of a bolt to find the nominal diameter D maj, and the inner diameter of a nut is D min. Interest shall accrue on overdue invoices at the rate of [4%] above the Bank of England’s base rate in place on the date that it became overdue and such interest shall be payable on the out standing Notwithstanding clause 7.1 above, the risk in the goods shall pass to you upon delivery of the goods to you or at premises nominated by you. You will hold the goods as the Company’s fiduciary agent and

Should you discover that any item the Company has hired to you is apparently defective, you must inform us immediately. We may require you to return the item before the hire period is completed. We With all overnight deliveries,please allow up to two working days for delivery, the carrier networks “next working day delivery” success rate is fast improving and has reached 95%, but due to Covid legacy issues, we still advise two days *** In addition to coarse and fine threads, there is another division of extra fine, or superfine threads, with a very fine pitch thread. Superfine pitch metric threads are occasionally used in automotive components, such as suspension struts, and are commonly used in the aviation manufacturing industry. This is because extra fine threads are more resistant to coming loose from vibrations. [8] Fine and superfine threads also have a greater minor diameter than coarse threads, which means the bolt or stud has a greater cross-sectional area (and therefore greater load-carrying capability) for the same nominal diameter. 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 BoltsProperty 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 all ISO 68-1:1998 ISO general purpose screw threads – Basic profile – Part 1: Metric screw threads. International Organization for Standardization. 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 The thread values are derived from rounded Renard series. They are defined in ISO 3, with "1st choice" sizes being from the Rˈˈ10 series and "2nd choice" and "3rd choice" sizes being the remaining values from the Rˈˈ20 series. [5]

These terms contain the entire agreement between the Company and you (hereafter ‘the Agreement’). No addition, alteration, substitution or waiver of these terms will be valid unless the Company has expressly accepted this in writing. The terms of the Agreement shall override and supersede any previous negotiations, agreements or arrangements between you and the Company. Unless otherwise stated on any invoice or quotation, the stated hire charge excludes VAT, carriage and If you need to make sure that you have the right size screw for the job, then please read on below. Metric Imperial Screw Conversion Chart Delivery will be made to the location that you designate. It is your responsibility to ensure that a responsible person is available to accept the delivery and to secure the goods at the delivery location. The Company shall not be liable for any damage or fault arising from incorrect storage of the goods. The Company may repossess the goods at any time after your authority to possess or sell the goods under clause 7.4 above has been terminated or the Company’s termination of the Agreement underdistress or execution is levied against any of your assets and is not paid or discharged within 7 days; a judgment against you remains unsatisfied for more than 7 days; a receiver is appointed with respect to any of your assets; or The repaired or replacement goods will be delivered to the original place of delivery and are otherwise subject to the provisions of this Agreement.

custody. You shall insure the goods at your own cost on the Company’s behalf and you will hold the proceeds of such insurance on trust for the Company.This is actually quite complicated, as was pointed out by Paul, one of our readers! Here is a more concise explanation of the relationship between gauge (imperial), diameter (metric in mm) and Head size. You shall keep and store the goods separately so as to enable them to be identified as the Company’s property. You hereby irrevocably license the Company, its representatives and its agents to enter upon your premises or any other premises to which you control the access and upon which the goods are present to enable the Company to recover its goods.

a b c ISO 965-1:2013 ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data. International Organization for Standardization. 15 September 2013. These are the basics to know when looking at screw sizes but to find out more about the thread of screws and other items you can look at Wikipedia. There’s a lot to learn if you’re interested! Metric Screw Sizes Explained Below are some common spanner (wrench) sizes for metric screw threads. Hexagonal (generally abbreviated to "hex") head widths (width across flats, spanner size) are for DIN 934 hex nuts and hex head bolts. Other (usually smaller) sizes may occur to reduce weight or cost, including the small series flange bolts defined in ISO 4162 which typically have hexagonal head sizes corresponding to the smaller 1st choice thread size (eg. M6 small series flange bolts have 8mm hexagonal heads, as would normally be found on M5 bolts). [9] ISO 262:1998 ISO general purpose metric screw threads – Selected sizes for screws, bolts and nuts. International Organization for Standardization. 17 December 1998. Should any item contracted out on hire by the Company be lost or damaged upon return, you will be liable for the cost of repair or replacement of that item and you shall pay that cost immediately uponThe Company will, at its option, either make good by repair or the supply of a replacement, defects which, under proper use, appear in the goods within a period of 12 months after the goods have been The design principles of ISO general-purpose metric screw threads ("M" series threads) are defined in international standard ISO 68-1. [2] Each thread is characterized by its major diameter, D ( D maj in the diagram), and its pitch, P. ISO metric threads consist of a symmetric V-shaped thread. In the plane of the thread axis, the flanks of the V have an angle of 60° to each other. The thread depth is 0.54125 × pitch. The outermost 1⁄ 8 and the innermost 1⁄ 4 of the height H of the V-shape are cut off from the profile. If for any reason you do not accept delivery of the goods when they are ready for delivery, or the Company is unable to deliver the goods on time because you have not provided appropriate instructions, documents, licences or authorisations, then (i) risk in the goods will pass to you (including for loss or damage); (ii) the goods will be deemed to have been delivered; and (iii) the Company may store the goods until delivery, and you will be liable for all related costs and expenses. any event in a foreign jurisdiction analogous to, or comparable with 12.1.2.1 to 12.1.2.3 above; or The sizing of screws in one of the most challenging things, but there are also a huge variety of different kinds of screw that can be used for a wide range of different job.