Screw, close tolerance
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 6240-01-534-4007
NSN 6110-01-213-0210
NSN 5925-01-332-7291
NSN 5960-01-082-2119
NSN 5895-00-503-3468
NSN 5996-01-608-6025
NSN 4140-01-014-3454
NSN 6220-00-943-7834
NSN 5920-01-286-4297
NSN 6620-01-500-9847
NSN 6150-01-054-4732
NSN 6145-01-072-9251