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.
Classification: Zirconium and articles thereof nesoi
NSN 6650-01-604-4445
NSN 6145-01-592-4223
NSN 6240-01-248-7888
NSN 6240-00-468-7089
NSN 6145-01-047-2080
NSN 6110-00-702-2495
NSN 6110-00-244-4907
NSN 5950-01-617-9147
NSN 6240-01-399-4105
NSN 5935-01-506-0581
NSN 5990-01-443-2931
NSN 6620-00-371-2183