Internal drive ribbed
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: Bolts and bolts and their nuts or washers exported in the same shipment
NSN 5990-01-485-0260
NSN 6220-01-522-4937
NSN 4140-01-439-1375
NSN 7035-00-185-8683
NSN 4140-01-165-4561
NSN 5960-01-536-9763
NSN 5945-01-009-0500
NSN 5920-01-141-5706
NSN 6150-00-554-7591
NSN 6240-01-205-0005
NSN 6320-01-525-4789
NSN 5930-00-483-4578