Machine Drawing

Screwed Fasteners 87

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d:\N-Design\Des5-1.pm5 Seventh Print

Width of the nut across corners = 2 D

Radius of chamfer arc, R = 1.5 D

Figure 5.13 illustrates the stages of drawing different views of a hexagonal nut,

following the above relations, which are self-explanatory.

D

D

2D

R

(^2) R^2
R 1
R^1
R
(a)

D

(b)

Fig. 5.13 Method of drawing views of a hexagonal nut (Method II)

The above method may be followed in routine drawing work, as it helps in drawing the

views quickly.

5.9.2 Method of Drawing Square (Bolt Head) Nut

A square bolt head and nut may be drawn, showing either across flats or corners. Following

relations may be adopted for the purpose: