Bearing surface of head to be grooved to 0.323 in. Min 0.325 in. Max dia, 0.050 in. Min 0.055 in. Max from top of head
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 5975-00-265-7774
NSN 6620-00-851-5381
NSN 6145-01-643-5038
NSN 5999-01-443-2466
NSN 6105-01-540-9428
NSN 6130-01-513-3015
NSN 5990-00-444-9993
NSN 5945-00-518-8285
NSN 5915-01-166-7999
NSN 5855-01-385-8846
NSN 6110-01-496-5947
NSN 5915-01-437-0950