TABLE 27.

WHITWORTH'S STANDARD 55° SCREW THREADS FOR BOLTS.

(With sizes of hexagonal nuts and bolt heads.)

WHITWORTH'S STANDARD SCREW THREADS, ETC.-(continued).

For gas and water pipes the Whitworth thread is unsuitable, and for this purpose the standard thread is much shallower, with a much finer pitch. The table below is the standard used in this country for that purpose:

TABLE 29.

WHITWORTH SCREW THREADS FOR HYDRAULIC IRON PIPING.

The internal and external diameters being those adopted by Messrs.
James Russell and Sons.