Thread Size : 0.1120-40UNJC-3B, Width Across Flats (in) : 0.181-0.189, Width Across Corners (in) : 0.207, Weight (lbs/100) : 0.02, Locking Insert : Red Nylon (350?F Max Performance), Series : 1660, Thread Type : UNJC, Thread Notes : MIL-S-7742 or AS8879, Material : Aluminum, Material Rating : 2011-T3 or Equivalent, Finish : Alodine, Finish Classification : Alodine, MIL-C-5541, Overall Height (in) : 0.11, Hex Height (in) : 0.07