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Effective August 21st, 2023, the Naval Air Warfare Center Aircraft Division (NAWCAD) has disapproved Timken Aurora’s qualification status for SAE-AS81820 and SAE-AS81935 specifications. Timken Aurora is working diligently to get requalified.

  • Body - Alloy steel - heat treated - protective coated for corrosion resistance.
  • Ball - Alloy steel - heat treated - hard chrome plated.
  • Race - Low carbon steel (or Alloy steel - heat treated)- protective coated for corrosion resistance - PTFE lined. (See 2D Sales Drawing for details.)
Unit of Measure

Key Dimensions

Part Number

 N/A AB-12T-22

Thread Type

 N/A Left Hand

Thread Configuration

 N/A Male

B - Ball Bore

 N/A .7500 in

W - Ball Width

 N/A .875 in

H - Head Width

 N/A .687 in

A - Base to Center

 N/A 2.875 in

D - Head Diameter

 N/A 1.750 in

Ball Diameter

 N/A 1.312 in

C - Thread Length

 N/A 1.750 in

Thread Size

 N/A 7/8-14

Thread Class

 N/A UNF-3A-LH

a - Misalignment Angle Clevis Mounted

 N/A 14 º

Ultimate Radial Static Load Capacity

 N/A 28,081

Type of Lubrication

 N/A PTFE liner