ASME B107.8 pdf download ADJUSTABLE WRENCHES DEFINITIONS See Fig. 1 as applicable. adjustab/e jaw movable portion of the wrench that contacts the fastener. adjusting worm: portion of the wrench used to adjust theclearance between the fixed and adjustable jaw. fixed jaw: portion of the frame that contacts the fastener frame portion of the wrench containing the fixed jawand handle. hand/e...