A: Thank you for your inquiry. The correct screws for 2x material is 2-1/2". So these Zinc coated will work for your 2x6 for indoor use.
A: 1-1/4 FINE thread. Course thread is better for pine type lumber.
A: For hardwoods, I would use the fine thread version of this screw: Model# SML-F125-250 Internet# 300680122 Store SKU# 1002697036
A: Keg #8, 1 1/4" square drive round head zinc coated.
A: All plywood is considered "soft wood" so, course threaded screws would be used.
A: Thank you for your inquiry. When working with 3/4" plywood, you will want to be using the 1-1/4" course threaded screws.
A: Coarse is for softwoods like pine, spruce and fir. Fine thread is for hardwoods like oak and maple. Fine thread is also good for metal too
A: Coarse for soft woods and plywood, fine for hardwoods.
A: It depends on the material that the threads are going into. Coarse threads to go into plywood and soft woods. Fine threads to go into hard woods such as walnut or oak.
A: Fine thread for hard wood, course thread for soft wood.
A: Thank you for your inquiry. You will be using the Fine Thread in Hardwood and the Coarse Thread in Softwood.