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Dies

Fastener assembly tool standards cover the tools, and their variable parts, that handle the fasteners during their installation. Given the variability within screwdrivers, starting from whether they are machine or hand operated, and continuing down all the way to the bits that actually make contact with the fastener, standardization promotes interchangeability between tools and parts of different manufacturers, and fasteners of yet a different manufacturer. These standards are related to the specifications of dies and their corresponding tools.

ISO 4231:2016

Hand- and machine-operated circular screwing dies for parallel pipe threads - G series

ISO 4231:2016 is a supplement to ISO 2568 and ISO 4230 and specifies the dimensions of hand- and machine-operated circular screwing dies intended for production of parallel pipe threads, G series, in accordance with ISO 228 1. The general dimensions of these dies (diameter, thickness and fixing dimensions) are in accordance with ISO 2568 so as to permit the driving of hand-operated dies with the aid of the die stocks defined in that document.

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ISO 2568:1988

Hand- and machine-operated circular screwing dies and hand-operated die stocks

This International Standard specifies the general dimensions of hand-operated and machine-operated screwing dies. These dimensions, established as a function of the thread diameter and pitch, are the following : outside diameter; thickness; cutting portion length; general dimensions of attachment. It also gives the interchangeability dimensions of hand-operated die stocks. This International Standard is applicable to screwing dies intended for the manufacture of the following threads: ISO metric threads: coarse thread, from Ml to M68; fine thread, from Ml to MS6. ISO inch threads: Unified coarse series (UNC), from No. 1 - 64 to 2 3/4 - 4; Unified fine series (UNF), from No. 0 - 80 to 1 1/2 - 12. The dimensional characteristics of circular screwing dies, as a function of thread diameters and pitches, are given in annex A. The general dimensions of screwing dies for threads which are not dealt with in this International Standard, and therefore are not recommended, are given for guidance only in annex B. Annex B is applicable to screwing dies for inch threads of the following types: B.1 - British Standard Whitworth (BSW). B.2 - British Standard Fine (BSFI. B.3 - British Association (BA). All screwing dies are available in two classes, namely non-precision screwing dies; precision screwing dies.

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ISO 4230:2016

Hand- and machine-operated circular screwing dies for taper pipe threads - R series

ISO 4230:2016 is a supplement to ISO 2568 and ISO 4231 and specifies the dimensions of hand- and machine-operated circular screwing dies intended for production of taper pipe threads, R series, in accordance with ISO 7 1. With the exception of the die 1/16, the general dimensions of these dies (diameter, thickness and fixing dimensions) are in accordance with ISO 2568 so as to permit the driving of hand-operated dies with the aid of the die stocks defined in that document.

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