Builder's hardware; a manual for architects, builders and house furnishers . nufactured for various pur-poses are almost infinite in variety, but so far as relates tobuilders hardware in general, it will be sufficient to consideronly the wood-screws, that is to say, the screws made forworking with wood. The materials of which screws are madefor this purpose are iron, steel, brass, copper, bronze and phos-phor-bronze. The screws commonly in use are of iron. Steelscrews are comparatively little used on account of the , copper, and bronze screws are used in connection withfinishing hard
Builder's hardware; a manual for architects, builders and house furnishers . nufactured for various pur-poses are almost infinite in variety, but so far as relates tobuilders hardware in general, it will be sufficient to consideronly the wood-screws, that is to say, the screws made forworking with wood. The materials of which screws are madefor this purpose are iron, steel, brass, copper, bronze and phos-phor-bronze. The screws commonly in use are of iron. Steelscrews are comparatively little used on account of the , copper, and bronze screws are used in connection withfinishing hardware. Phosphor-bronze screws are used only inspecial cases. Iron wood-screws are made in twenty different lengths, vary-ing from one-quarter inch to six inches. Brass and nickel-plated screws are made only as high as three inches in length of screws has from six to eighteen varieties inthickness, there being in all thirty-one different gauges; sothat altogether there are about 250 different sizes of ordinary Chapter III. Wood-Screws. Screw Sizes. SCREW WIRE No. Diarn. ® 17. .058 © 1(3. .005 €> 15. .072 © 14. .083 €> 13. .095 ® 12. .100 © 11. .120 ^) 10- -134 © 9. .148 ft 8. .165 Fig. 18. Diameters of Wire. From American Screw American Screw Gauge. 2Okl Standard Birmingham Gauge. t= r-- i fc -J L -1 b < I 1 1 J (? —, -a 26 BUILDERS HARDWARE. ?Chapter in. wood-screws in the market. Figure 18 gives the different gauges in use from zero to thirty. Iron screws are finishedwith either a bronze, japanned, lacquered on tinned & F. Corbin also manufacture copper, bronzed, and silver-
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