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.
Dept. of the Air Force 
Dept. of the Navy 
Finland 
Spain 
Singapore 
Malaysia 
Australia 
Canada 
Republic of Korea 
Italy Classification: Bolts and bolts and their nuts or washers exported in the same shipment
NSN 5910-01-187-7968
NSN 5945-01-576-5936
NSN 5985-00-031-3993
NSN 5930-01-206-4659
NSN 5910-00-769-0735
NSN 6150-01-158-6152
NSN 5985-01-168-7839
NSN 5910-01-446-6477
NSN 6105-01-631-7028
NSN 5920-01-540-3428
NSN 6685-00-581-8868
NSN 6150-01-158-6152