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 5905-01-501-6178
NSN 4140-01-167-7574
NSN 6320-01-352-8084
NSN 6220-00-471-4011
NSN 7035-00-286-6221
NSN 4140-00-163-6200
NSN 6135-01-657-0554
NSN 6220-01-432-0089
NSN 5905-00-844-3437
NSN 6650-01-158-1871
NSN 6645-00-975-6941
NSN 5975-00-879-8756