Black dye or paint on thread end
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 6610-01-123-7292
NSN 6320-01-652-3806
NSN 5835-01-357-9235
NSN 6645-01-659-8683
NSN 5999-00-928-5658
NSN 6650-01-190-8607
NSN 5935-01-054-0866
NSN 5999-01-129-3282
NSN 6620-01-651-5425
NSN 5920-01-327-2272
NSN 5999-00-900-4778
NSN 5895-01-597-4128