5/16-24 Hex nut for attaching mud pan shelves on 1932 – 1936 Cadillac V8, V12 and V16. Finished in black oxide to prevent rust.
Cadillac part number 120368, alternative group number 25.0080.
Listed in the Cadillac parts book as:
Group 10.1143, Nut, Qty 24, Application 345BC 355BC 370BC 452BC 36-80 85
Material: Steel
Finish: Black oxide
Thread: 5/16-24
Hex: .500
Length: .460