Special Features:

Head end has slot 0.060 wide by 0.248 long, head end also drilled and stepped 0.094 diameter step diameter 0.188 with 63 micro-inch finish; thread end has 0.110 tip by 0.145 diameter before thread starts, tip has 0.040 diameter hole through on centerline; screw has relief 0.965 from theaded end 0.099 wide a 32 micro-inch finish in this area

Properties:

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.