The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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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 - PH 13-8 Mo stainless steel per AMS 5629 - heat treated.
  • Ball - 440C stainless steel per AMS 5630 - heat treated.
  • Optional Ball - 13-8 Mo stainless steel per AMS 5629 - heat treated. (Specify by adding suffix "C" ex.: ATM-3ETC)
  • 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
  • No load rotational breakaway torque can be varied to meet specific application requirements.
  • Keyways are available. Units are supplied without keyways. When a keyway is required, specify by adding suffix "K". Ex.: ATMK-3T.
  • As applicable, keyways will conform to SAE-AS81935/3 or NAS 559.
  • All threads are rolled after heat treatment, and conform to UNJF-3A per AS8879.
  • Rod End Bearings listed are manufactured to conform to the dimensions, materials, and configurations of SAE-AS81935/8, and are approved for procurement under this specification.
ASM-T & ASB-T Image
Unit of Measure
1 2 3 4 

Part Number

Thread Type

B - Ball Bore

W - Ball Width

H - Head Width

A - Base to Center

D - Head Diameter

C - Thread Length

Thread Size

Ultimate Radial Static Load Capacity

CAD

ATM-6ETC N/A Right Hand N/A .3750 in N/A .406 in N/A .322 in N/A 2.030 in N/A 1.131 in N/A 1.187 in N/A 3/8-24 N/A 13,000 lb N/A
ATB-6ET N/A Left Hand N/A .3750 in N/A .406 in N/A .322 in N/A 2.030 in N/A 1.131 in N/A 1.187 in N/A 3/8-24 N/A 13,000 lb N/A
ATB-6ETC N/A Left Hand N/A .3750 in N/A .406 in N/A .322 in N/A 2.030 in N/A 1.131 in N/A 1.187 in N/A 3/8-24 N/A 13,000 lb N/A
ATMK-6ET N/A Right Hand N/A .3750 in N/A .406 in N/A .322 in N/A 2.030 in N/A 1.131 in N/A 1.187 in N/A 3/8-24 N/A 13,000 lb N/A
ATMK-6ETC N/A Right Hand N/A .3750 in N/A .406 in N/A .322 in N/A 2.030 in N/A 1.131 in N/A 1.187 in N/A 3/8-24 N/A 13,000 lb N/A
ATBK-6ET N/A Left Hand N/A .3750 in N/A .406 in N/A .322 in N/A 2.030 in N/A 1.131 in N/A 1.187 in N/A 3/8-24 N/A 13,000 lb N/A
ATBK-6ETC N/A Left Hand N/A .3750 in N/A .406 in N/A .322 in N/A 2.030 in N/A 1.131 in N/A 1.187 in N/A 3/8-24 N/A 13,000 lb N/A
ATM-7ET N/A Right Hand N/A .4375 in N/A .437 in N/A .353 in N/A 2.250 in N/A 1.294 in N/A 1.281 in N/A 7/16-20 N/A 17,800 lb N/A
ATM-7ETC N/A Right Hand N/A .4375 in N/A .437 in N/A .353 in N/A 2.250 in N/A 1.294 in N/A 1.281 in N/A 7/16-20 N/A 17,800 lb N/A
ATB-7ET N/A Left Hand N/A .4375 in N/A .437 in N/A .353 in N/A 2.250 in N/A 1.294 in N/A 1.281 in N/A 7/16-20 N/A 17,800 lb N/A
ATB-7ETC N/A Left Hand N/A .4375 in N/A .437 in N/A .353 in N/A 2.250 in N/A 1.294 in N/A 1.281 in N/A 7/16-20 N/A 17,800 lb N/A
ATMK-7ET N/A Right Hand N/A .4375 in N/A .437 in N/A .353 in N/A 2.250 in N/A 1.294 in N/A 1.281 in N/A 7/16-20 N/A 17,800 lb N/A
ATMK-7ETC N/A Right Hand N/A .4375 in N/A .437 in N/A .353 in N/A 2.250 in N/A 1.294 in N/A 1.281 in N/A 7/16-20 N/A 17,800 lb N/A
ATBK-7ET N/A Left Hand N/A .4375 in N/A .437 in N/A .353 in N/A 2.250 in N/A 1.294 in N/A 1.281 in N/A 7/16-20 N/A 17,800 lb N/A
ATBK-7ETC N/A Left Hand N/A .4375 in N/A .437 in N/A .353 in N/A 2.250 in N/A 1.294 in N/A 1.281 in N/A 7/16-20 N/A 17,800 lb N/A
ATM-8ET N/A Right Hand N/A .5000 in N/A .500 in N/A .400 in N/A 2.544 in N/A 1.459 in N/A 1.468 in N/A 1/2-20 N/A 24,200 lb N/A
ATM-8ETC N/A Right Hand N/A .5000 in N/A .500 in N/A .400 in N/A 2.544 in N/A 1.459 in N/A 1.468 in N/A 1/2-20 N/A 24,200 lb N/A
ATB-8ET N/A Left Hand N/A .5000 in N/A .500 in N/A .400 in N/A 2.544 in N/A 1.459 in N/A 1.468 in N/A 1/2-20 N/A 24,200 lb N/A
ATB-8ETC N/A Left Hand N/A .5000 in N/A .500 in N/A .400 in N/A 2.544 in N/A 1.459 in N/A 1.468 in N/A 1/2-20 N/A 24,200 lb N/A
ATMK-8ET N/A Right Hand N/A .5000 in N/A .500 in N/A .400 in N/A 2.544 in N/A 1.459 in N/A 1.468 in N/A 1/2-20 N/A 24,200 lb N/A
ATMK-8ETC N/A Right Hand N/A .5000 in N/A .500 in N/A .400 in N/A 2.544 in N/A 1.459 in N/A 1.468 in N/A 1/2-20 N/A 24,200 lb N/A
ATBK-8ET N/A Left Hand N/A .5000 in N/A .500 in N/A .400 in N/A 2.544 in N/A 1.459 in N/A 1.468 in N/A 1/2-20 N/A 24,200 lb N/A
ATBK-8ETC N/A Left Hand N/A .5000 in N/A .500 in N/A .400 in N/A 2.544 in N/A 1.459 in N/A 1.468 in N/A 1/2-20 N/A 24,200 lb N/A
ATM-10ET N/A Right Hand N/A .6250 in N/A .625 in N/A .510 in N/A 2.832 in N/A 1.763 in N/A 1.562 in N/A 5/8-18 N/A 38,500 lb N/A
ATM-10ETC N/A Right Hand N/A .6250 in N/A .625 in N/A .510 in N/A 2.832 in N/A 1.763 in N/A 1.562 in N/A 5/8-18 N/A 38,500 lb N/A
Unit of Measure
1 2 3 4