Fig. 111
Fig. 112
Fig. 113
Fig. 114
86. Chain Bolts and Foot-Bolts.—A type of rim bolt used chiefly to secure the standing leaf of double doors is shown in [Fig. 111]. These bolts are made in various sizes, finishes, and grades, and in both plain and ornamental design. In the figure, the chain bolt is shown at (a), while the foot-bolt is illustrated at (b).
87. Flush Bolts.—Bolts that are intended to perform the same function as chain bolts and foot-bolts, but are sunk into the stile of the door flush with its surface or edge, are known as flush bolts. These bolts, which are illustrated in Figs. [112] and [113], are made in various styles, grades, and finishes, from the smaller kinds for cabinet purposes to the large, double-mortise extension bolt. A flush bolt with a knob is shown in [Fig. 114], while a heavy, T-handle extension bolt is shown in [Fig. 115].