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 5910-01-141-7666
NSN 5905-00-565-9618
NSN 5950-01-300-8522
NSN 5945-00-149-1857
NSN 6320-01-495-6893
NSN 6320-00-809-5744
NSN 5985-00-669-6616
NSN 5950-01-009-2994
NSN 5895-01-634-0630
NSN 5998-01-557-3955
NSN 4140-01-371-1565
NSN 6685-00-055-7656