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 6610-01-558-1815
NSN 6650-00-629-8027
NSN 5999-01-420-6901
NSN 6150-01-414-4476
NSN 5960-01-292-8309
NSN 6320-01-592-6248
NSN 5985-00-717-3806
NSN 5925-01-460-3043
NSN 6650-01-389-9212
NSN 6110-01-143-9296
NSN 5925-00-825-3241
NSN 5930-00-145-5613