A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.
Dept. of the Navy NSN 6610-01-439-2651
NSN 4140-01-562-4449
NSN 6610-01-603-0703
NSN 5835-01-414-3258
NSN 4140-01-065-1884
NSN 6240-00-174-8902
NSN 5996-01-141-6916
NSN 5985-01-435-3684
NSN 6150-00-862-3247
NSN 6145-01-181-9376
NSN 5855-01-103-1474
NSN 6130-01-376-6939