Imperial thread terms help please

Can anyone help with an explanation of a couple of terms. Google is useful but not completly understanding a couple of things.

Specifically 5/16 face. Whats this?
16 pitch is the tpi perhaps
Bore interference fit for boss means it will have to be pressed into a hole, or something will be pressed into the hole in the centre of this ring gear…

Any help much appreciated.

The width of the contact surface?

Are there any more views/elevations on the drawing?

I thought I was pretty good at reading engineering drawing/sketches, but that makes my head hurt.

It’s gear tetminology.

Pitch = (teeth +2)/od.

50+2/3.25 =16

https://www.mcmaster.com/info/how-to-choose-a-gear.html

5/16″ wide tooth

I can’t see anything refering to a thread on that section of drawing.

It’s all  relating to a gear, 50 teeth @ 16 diametral pitch with 5/16″ face width (effective width of the gear).

Found a calculator here https://evolventdesign.com/pages/blank-calc?srsltid=AfmBOoobxsgp7bOTdcdnGaOVADYR222NDQDWhikOLjACyVzdLvpKHGvL

Number of Teeth: 50
Diametral Pitch: 16
Pressure Angle: 14.5 degrees
Gear Type: External

Outputs
OD Reference: 82.5500 mm 3.2500 in
Pitch Diameter: 79.3750 mm 3.1250 in
Root Diameter: 75.4063 mm 2.9688 in

Addendum: 1.5875 mm 0.0625 in
Dedendum: 1.9844 mm 0.0781 in
Working Depth: 3.1750 mm 0.1250 in
Whole Depth: 3.5719 mm 0.1406 in
Circular Pitch: 4.9873 mm 0.1963 in
Tooth Thickness: 2.4936 mm 0.0982 in
Base Circle: 76.8467 mm 3.0255 in

Tapered face of an individual tooth. Terminology with drawing here, scroll down… https://themechanicalengineering.com/spur-gear/

something will be pressed into the hole in the centre of this ring gear…

In engineering “boss” can mean any of a few things. It could be part of a shaft that the gear is mounted on and it can be the hole that a shaft is fitted into; it protrudes

Interference for suggests that the gear won’t be turning around the boss but driving whats on the other end.

There should be some specification for the pressure angle aswell shouldn’t there?