紧固件 产品等级F 机械连接件；产品等级F的技术交货条件、型式和尺寸精度

Fasteners
Product grade F

Mechanische Verbindungselemente; technische Lieferbedingungen, Ausführungen und Maßgenauigkeit für Produktklasse F

In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker.

Dimensions in mm

1 Scope and field of application

This standard specifies tolerances for product grade F screws, bolts and nuts with thread diameters from 1 to 3 mm.

It is recommended that this standard should also be used for non-standardized fasteners.

Product grade F generally refers to the quality of products for which stringent requirements are made with respect to tolerances (e.g. in precision mechanics).

2 Thread diameters

3 Thread lengths

P = pitch of thread

4 Nominal lengths

Continued on pages 2 to 5.

Beuth Verlag GmbH, Berlin, has the exclusive right of sale for German Standards (DIN-Normen).

1

5 Driving geometry

5.1 Widths across flats and widths across corners

The specified tolerances for widths across flats and the minimum widths across corners apply to fasteners where the height of hexagons, m', is equal to 0,7 m or more:

m' ≥ 0,7 m

5.2 Slots

6 Head heights

6.1 Head diameters

2

6.2 Head heights

7 Thickness of nuts

8 Shank diameters

The shank diameter is approximately equal to the pitch diameter.

3

9 Geometrical tolerances

4

Table 6 (continued)

Table 6 (concluded)

Explanatory notes

This standard has been prepared by Normenausschuß Feinmechanik und Optik (Precision Mechanics and Optics Standards Committee).

5

6.2 Rechtwinkligkeitstoleranz

1) Siehe Seite 7

(fortgesetzt)

6