J'ai trouvé un site où les differents modèles de seat T bar sont representés.
Je met en copie ses caractéristiques.

I found a site where different models of seat bar T are represented.
I put a copy characteristics.

He encontrado un sitio donde se muestran los diferentes modelos de T-bar de asinto.

Pongo una copia de sus características.

3105-36T4 - SEAT BAR, Type 4  with hardened, ground, Steel Double Bushings

Raised XE-39, on top, and DIF foundry mark, on bottom. 2 clevis pin holes, 2 clevis pin studs on each side,large double clevis pin bushings. Same as type 3 but with grease fitting on bottom and 9/16" counterbore to allow grease fitting to seal flat. 1941-1950's Big Twins and 45".