The Stanley No. 80 scraper plane was made in two eras, each using different screw threads. Choosing the correct kit is easy – match your thread size and order with confidence.
Thread Size: 10-28
Kit includes 2× 10-28 × 3/8" screws and 1× 10-28 × 15 mm screw.
The two shorter screws secure the blade, and the longer screw tensions the bar.
Thread Size: 1/4-28
Kit includes 3× 1/4-28 × 15 mm screws.
All three screws are the same length and secure both the blade and the tension bar.
I just don't make the 3/8 1/4-28. Eventually we will.
If unsure, Do the Qtip test. Watch the video below to learn what that is.
All Blade Tension screws need to be 15mm long or it wont touch the blade. I eliminated that problem by making the screw kits easy to buy. Its also a good kit for every woodworker to have.