CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 



437 



No. 11978. 



No. 11982. 



No. 11970. 



No. 11988. 



No. 11994. 



11964. SCREW DIES, round, adjustable. 



Xo A B C D 



Diameter of die, inches 1 1% 2% 



Diameter of screw, inches Vt % % % 



No. threads to inch 20 16 12 10 



Each *L10 L10 1.50 3.00 



11965. SCREW DIE STOCK, for holding Xo. 11964 Dies. 



Xo ABC 



For die of diameter, inches 1 l^ie 2% 



Each 1.80 3.70 4.00 



11968. SCREW DIE AND TAP SET, with stock 7 inches long, tap wrench 7% inches long, 6 dies i^ 6 

 inch diameter and 6 taps cutting threads 4-36, 6-32, 8-32, 10-24, 12-24 and 14-20. Set is en- 

 closed in neat hardwood case 8.00 



11970. SCREW DIE AND TAP SET, with stock 9 inches long, 5 dies 1 inch in diameter, and 5 taps 

 cutting threads ^4-20, %6' 18 > %-l*>, vie-14 and %-12. Set is enclosed in neat hardwood case. 



12.50 



11978. SCREW DRIVERS, with steel blade in wooden handle. 



Length, inches 4 8 



Each 20 .35 



11980. SCREW DRIVER, rosewood handle and finest steel blade, elegantly polished throughout. Es- 

 pecially adapted for instrument use. Indispensible to the laboratory. Length over all, 5% 



inches; length of blade, 2 inches; width of blade, % inch .40 



11982. SCREW DRIVER, Jewelers', of steel, nickel-plated, with blade i^ 6 inch in width. Length over 



all, 3 1 ! inches .25 



11984. SCREW DRIVER, Ratchet, a high grade tool. Blade and ratchet mechanism made of oil tem- 

 pered tool steel; changes from right to left are made by turning the knurled ferrule. Length 



of blade, 6 inches; width of blade, >4 inch 1.10 



11988. SCREW DRIVER POCKET SET, with 3 blades of assorted sizes and 1 reamer for making or en- 

 larging holes. When not in use the blades are kept in the hollow handle. 314 inches long 



when closed; polished and nickel-plated .90 



11994. SCREW EYES, of bright wire. 



Xo 214 12 7 



Length, approx., inches % 1 IV, 



Per dozen ., 05 .07 .12 



