Types and Uses - Continued

Types and Uses - Continued - 14256_155

Types and Uses - Continued - 14256_157

Tools And Their Uses - Hand tools and what they are used for
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TM 9-243 TYPES AND USES - Continued BOX WRENCHES (Cont) wrench/alignment pin combination. It is usually used on heavy structural construction (bridge girders, building beams, etc.). The half-moon wrench has different size openings at each end and has a curved shank. The half-moon wrench is used when it is necessary to reach around objects in tight spaces. The split-box wrench is a 12-point wrench with 2 points cut away. The split-box wrench is used on pipe unions or couplings where you want the protection of a box wrench, but need to slide the wrench around a pipe. The structural-tapered handle wrench combines a box wrench opening with a tapered shank to produce a box Ratchet-box wrenches are either reversible or non- reversible. The ratchet-box wrench does not have to be lifted up and repositioned each time the shank has reached its maximum travel between two obstructions. The ratchet-box wrench provides an easy means of removing and/or installing nuts or bolts which are not under strain. These wrenches should not be used to torque down or to free nuts or bolts. COMBINATION WRENCHES The combination wrench combines the best features of the open-end and box wrench into a single wrench. The size opening on the wrench is the same on both ends, but one end has a box head and the other end has an open-end head. The length of the wrench varies with the size of the head. The most common opening is offset from the shank by 15 degrees. They are used to remove common-size nuts and bolts. 25-4

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