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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 - 17-4 PH stainless steel per AMS 5643 - heat treated.
  • PTFE Liner - (AT 3200) Permanently bonded to race inside diameter, qualified to SAE-AS81820 Type A.
  • Temperature range: -65°F to +325°F
Unit of Measure

Part Number

 N/A PRXB-5T-1

Thread Type

 N/A Left Hand

Thread Configuration

 N/A Male

B - Ball Bore

 N/A .3125 in

W - Ball Width

 N/A .437 in

H - Head Width

 N/A .327 in

A - Base to Center

 N/A 2.687 in

D - Head Diameter

 N/A 1.025 in

Ball Diameter

 N/A .593 in

C - Thread Length

 N/A 1.750 in

Thread Size

 N/A 7/16-20

Thread Class

 N/A UNJF-3A-LH

a - Misalignment Angle

 N/A 14 º

Ultimate Radial Static Load Capacity

 N/A 15,671 lbs