What Size Screws For 2X4. Selecting the proper nail and using it correctly. The screws to sister 2 2x studs should be 2 1/2 inches (2 3/4 would be fine, but an uncommon size). Also, i figured that 3.5 inch length would be good as they would go almost 3 inches into the studs (the drywall is half inch).

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Asm makes it easy to order metric hardware, including metric screws, spacers, and standoffs. Sizing for oem laptop screws is a bit confusing. You can also choose from healthcare, heavy industry, and general.

Headers are usually made of 2x4s or 2x6s and 1/2 plywood.

I plan to pick up some #8 3″ screws for hangers, etc and a stash of their trim screws also. 4mm is the length of the screw. Sizing for oem laptop screws is a bit confusing. Also, i figured that 3.5 inch length would be good as they would go almost 3 inches into the studs (the drywall is half inch). I am going to use deck screws. Metric equivalents to imperial gauge. For 2x4 headers, two 3 screws on the ends and two every 16. I would use 2 1/2 and if for some reason i want it to bite more i would just countersink one of the 2 x 4's.