The International Cessna^® 170 Association

I need help in locating part numbers and drawings that refer to the DZUS fasteners that held the original air filter on my C170B sn 26433 w Cont 145 engine.

I have a C170 manual, 100 Series Repair Manual, and an orig 1948 170 parts manual. No listing or drawing of DZUS quarter turn fasteners!

Continental Engine O H manuals were no help either.

Please help