Dry film lubricant p.S. 18021 cl 1
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 6130-00-133-5879
NSN 6650-01-555-8819
NSN 6240-01-109-4680
NSN 6645-01-481-4418
NSN 6220-01-632-5778
NSN 6145-01-436-4900
NSN 4140-01-099-1698
NSN 5985-01-310-8473
NSN 6145-01-601-5040
NSN 6645-00-527-6531
NSN 5915-00-265-0967
NSN 2925-01-430-4206