21.040.10 - Metric screw threads

This document specifies the basic dimensions of ISO metric trapezoidal screw threads in accordance with ISO 2902. The values refer to the design profiles in accordance with ISO 2901. This document is chiefly applicable to traversing threads for traversing motion on machines, tools, etc. It can also be used for fastening threads.

This International Standard specifies requirements for ISO metric screw threads for use with spectacle
frames. Provision is made for screw threads of the following nominal sizes: S0,8 × 0,2; M1,0 × 0,25;
M1,2 × 0,25; M1,4 × 0,3; M1,6 × 0,35 and M2,0 × 0,4 and for related taps and gauges.

ISO 11381:2016 specifies requirements for ISO metric screw threads for use with spectacle frames. Provision is made for screw threads of the following nominal sizes: S0,8 × 0,2; M1,0 × 0,25; M1,2 × 0,25; M1,4 × 0,3; M1,6 × 0,35 and M2,0 × 0,4 and for related taps and gauges.

ISO 2901:2016 specifies the basic and design profiles of ISO metric trapezoidal screw threads. ISO 2901:2016 is chiefly applicable to traversing threads for traversing motion on machines, tools, etc. It can also be used for fastening threads.

ISO 2902:2016 specifies a series of diameter and pitch combinations for ISO metric trapezoidal screw threads having the basic and design profiles according to ISO 2901. ISO 2902:2016 is chiefly applicable to traversing threads for traversing motion on machines, tools, etc. It can also be used for fastening threads.

ISO 2903:2016 specifies a tolerance system for metric trapezoidal screw threads in accordance with ISO 2902. The tolerances refer to the design profile in accordance with ISO 2901. The tolerance system does not apply to trapezoidal screw threads with special requirements on axial displacement, for example, machine tool lead and feed screws and nuts.

This International Standard specifies the characteristics of hexagon high nuts (style 2) with metric fine pitch thread, with nominal thread diameters, D, from 8 mm up to and including 36 mm, with product grade A for sizes D ≤ 16 mm and product grade B for sizes D > 16 mm. If, in special cases, specifications other than those listed in this International Standard are required, they can be selected from existing International Standards, for example ISO 724, ISO 898-2, ISO 965-1 and ISO 4759-1.

ISO 965-1:2013 specifies a tolerance system for ISO general purpose metric screw threads (M) conforming to ISO 261. The tolerance system refers to the basic profile according to ISO 68-1.

This International Standard specifies the geometry of hexagon nuts with nominal thread diameter from 8 mm up to and including 64 mm and the mechanical properties of hexagon regular nuts (style 1) with metric fine pitch thread in product grade A for nominal thread diameters 8 mm ≤ D ≤ 16 mm and in product grade B for nominal diameters 16 mm < D ≤ 39 mm. If, in special cases, specifications other than those listed in this International Standard are required, they can be selected from existing Inte...view more

This International Standard specifies the characteristics of chamfered hexagon thin nuts (style 0), with metric fine pitch thread, with nominal thread diameters, D, from 8 mm up to and including 64 mm, with product grade A for sizes D ≤ 16 mm and product grade B for sizes D > 16 mm. If, in special cases, specifications other than those listed in this International Standard are required, they can be selected from existing International Standards, for example ISO 724, ISO 898-2, ISO 965-1, ISO 350...view more

This International Standard specifies the characteristics of prevailing torque type all-metal hexagon high nuts with metric fine pitch thread, with nominal thread diameters, D, from 8 mm up to and including 36 mm, in product grade A for sizes D up to and including 16 mm and product grade B for sizes D above 16 mm, and with property classes 8, 10 and 12.

This International Standard specifies the characteristics of prevailing torque type hexagon regular nuts (with non-metallic insert) with metric fine pitch thread with nominal thread diameters, D, from 8 mm up to and including 36 mm, in product grade A for sizes D up to and including 16 mm and product grade B for sizes D above 16 mm, and with property classes 6, 8 and 10. If other specifications are required, they can be selected from existing International Standards, for example ISO 261, ISO 724...view more

This International Standard specifies the characteristics of hexagon socket head cap screws with metric fine pitch thread with nominal thread diameters, d, from 8 mm up to 36 mm and product grade A. For approximate masses of screws, see Annex A.

This International Standard specifies the characteristics of hexagon head bolts with metric fine pitch thread with nominal thread diameters, d, from 8 mm to 64 mm, of product grade A for nominal thread diameters, d, from 8 mm to 24 mm and nominal lengths, l, up to and including 10d or 150 mm, whichever is the shorter, and
of product grade B for nominal thread diameters, d, over 24 mm or nominal lengths, l, over 10d or 150 mm, whichever is the shorter. If, in special cases, specifications other ...view more

This International Standard specifies the form and dimensions of ends of parts with external ISO metric screw thread (e.g. bolt, screw and stud ends) recommended for use. They apply to standardized or non-standardized threaded parts. For each end type, a symbol is specified and it is intended that these symbols be used when specifying one of the ends for threaded fasteners.

ISO 8676:2010 specifies the characteristics of hexagon head screws with metric fine pitch thread with nominal thread diameters, d, from 8 mm to 64 mm of product grade A for nominal thread diameters, d, from 8 mm to 24 mm and nominal lengths, l, up to and including 10d or 150 mm, whichever is the shorter, and of product grade B for nominal thread diameters, d, over 24 mm or nominal lengths, l, over 10d or 150 mm, whichever is the shorter.

ISO 4753:2011 specifies the form and dimensions of ends of parts with external ISO metric screw thread (e.g. bolt, screw and stud ends) recommended for use. They apply to standardized or non-standardized threaded parts.
For each end type, a symbol is specified and it is intended that these symbols be used when specifying one of the ends for threaded fasteners.

TC - Modification to Figure 2