Retaining element in shank
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.
NSN 5985-01-604-6501
NSN 6620-00-684-6771
NSN 5895-01-025-8346
NSN 5960-01-064-5650
NSN 6610-01-066-4664
NSN 6685-01-529-9739
NSN 5915-01-241-0253
NSN 5975-00-889-5118
NSN 6135-01-633-8502
NSN 6220-01-192-1908
NSN 5905-01-069-4042
NSN 6220-00-920-8225