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 5985-01-440-2412
NSN 5960-01-323-6432
NSN 6645-00-151-5280
NSN 5990-00-912-9166
NSN 5990-00-829-4238
NSN 5910-01-176-8877
NSN 6220-01-119-0742
NSN 4140-01-457-5539
NSN 5975-00-231-5927
NSN 5925-01-215-7077
NSN 4140-00-164-6832
NSN 5855-01-410-8979