To case. (28). Zinc.
Mustang application note: These were used in production up to Job #1 of 1965 production. The change was made due to complaints of fluid leakage at some bolts. See 7A194-1AK for the replacement style. (TSB 198).
Ford Thunderbird Years:
1955 (55), 1956 (56), 1957 (57)
Above years shown are used for searches and are not application listings.
NPD Part Number : T-7A194-1K Manufacturer Reference #'s: 20326-S, 34806-S
1955-1957 TBIRD FM
1965-1965 MUSTANG (BEFORE 8/15/64), C4 A/T, SEE ALSO 7A194-1AK
1960-1964 FALCON C4
1964-1964 FAIRLANE C4
WARNING: This product can expose you to chemicals including lead and DEHP, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.