Combination wrenches

Machine screws (or bolts) require special tools. The combination wrench is one type of hand tool used with machine screws. The adjustable wrench is more versatile, allowing the technician to use it with different sizes of machine screws (see Figure 8-20). We may also use pliers, second-class levers, during the combining process. Pliers can be found in various types (see Figure 8-21). Slip joint pliers allow material to be held firmly. Needle nose pliers can hold smaller items. Diagonal pliers (cutters) are actually a shearing tool for wire. 

The apparatus consists essentially of a cast iron crucible and cover or fusion pot in which is placed a nickel crucible or dish. The complete apparatus is illustrated in Fig. II, 50, 1. The fusion pot A carries a combined thermometer well T and an inlet tube BCD, and a wide outlet tube E. The thermometer well T is closed at the bottom (welded) and projects 6-7 mm. below the wider inlet tube to which it is welded near the top. There is a gland or asbestos-cord packed joint at F, held in position by a hexagonal nut the nut, fixed firmly in place by means of a wrench so as to make the gas-tight joint, enables the tube BCD to be raised or... 

To remove a spark plug, it s safer to use a rubber-cushioned spark-plug socket (1) rather than the T-handled combination bar and plug wrench that usually comes with chainsaws. Loosen the plug just enough to enable you to remove it by hand. If you use a wrench during the last turns, you could damage the threads. 

B107.6-1994 Wrenches, Box, An ed, Open E nd, Combination, Flare Nut, and Tappet (Inch Series)... 

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