DIN 934 - Full Hexagon Nuts, Left-Hand Metric Fine Pitch
This datasheet provides technical specifications, dimensions and tolerances for full hexagon nuts with left-hand metric fine-pitch threads available from Westfield Fasteners, with dimensions based on DIN 934.
These full-height hexagon nuts feature a left-hand metric fine-pitch thread. Unlike conventional right-hand nuts, they tighten anticlockwise and loosen clockwise when viewed from the end of the threaded component.
Fine-pitch threads have a smaller pitch than the corresponding standard metric coarse thread. These nuts must be used with bolts, screws or studs having the same nominal thread diameter, fine pitch and left-hand thread direction.
Designed for tightening with a suitable spanner or socket, left-hand nuts are used in applications where the direction of rotation or other operating conditions make a left-hand thread desirable. They may also be used with a compatible left-hand thin nut in a double-nut locking arrangement, where appropriate to the assembly design.
DIN 934 specifies dimensions and tolerances for hexagon nuts. The dimensional requirements for the full-height hexagon form provide the basis for the products described in this datasheet, while the applicable metric fine thread pitch and left-hand thread direction must also be specified.
DIN 934 has been superseded by ISO standards, including ISO 4032 for coarse-pitch hexagon nuts and ISO 8673 for fine-pitch hexagon nuts. Differences in dimensions may exist between the DIN and ISO specifications, so interchangeability should be checked against the relevant requirements.
Figure 1 and Table 1 show the form and dimensional information applicable to the range offered by Westfield Fasteners.
