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 4140-00-456-2268
NSN 6135-01-449-2144
NSN 5998-01-614-5032
NSN 5930-01-625-1412
NSN 2925-00-961-2117
NSN 5920-01-562-3137
NSN 5990-01-605-9026
NSN 5920-01-426-8517
NSN 6105-01-106-4157
NSN 4140-00-833-2952
NSN 5975-01-089-5167
NSN 5915-00-825-0453