Fifr. 22^>. a. Flat-head Wood-screw, b. Round-head Wood-screw. c. FiUister-head Wood-screw. d. Oval-couiitersunk-head Wood-screw, e. Drive-screw, f. Square-head (lag-or coach-) Screw. WOOD FASTE^riXGS. 127 retighteiied. The disadvantages are, that they are expensive, thatthey take time to… … Fig-. 230. a. Stove-bolt, b. Carriagre-bolt.c. Machine-bolt. BOLTS Bolts with nuts are useful where great strength is desired. Thereare three chief varieties, Fig. 230. Stove-holts are cheaply made (cast) boltshaving either flat or round heads with a. slot forthe screwdriver, like ordinary screws.…
Woodwork
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