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 6645-00-510-6643
NSN 6645-01-147-6577
NSN 5905-01-307-3979
NSN 5910-01-150-8546
NSN 5998-01-235-4319
NSN 6135-00-403-0213
NSN 6650-00-864-2942
NSN 5855-01-604-9997
NSN 5925-00-186-8669
NSN 5935-00-576-0198
NSN 4140-01-383-4738
NSN 6645-01-090-2555