Standing in the fastener aisle staring at a hundred little boxes? Here's how to pick the right one so your project actually holds.
The fastener aisle is overwhelming on purpose โ there's a right one for nearly every job. You don't need to know all of them, just how to choose. Here's the plain version.
Rough rule: nails hold well against shear (sideways force) and go fast, which is why framing and trim use them. Screws hold far better against pull-out and can be backed out and adjusted, which is why they win for anything that carries weight, might need to come apart, or needs to draw two pieces tight. For most homeowner projects โ shelves, hardware, repairs โ screws are the safer default.
A fastener should sink about two-thirds of its length into the material it's anchoring into. Too short and it won't hold; too long and it pokes through the other side. For thickness (gauge), heavier loads want a fatter screw โ but the fatter it is, the more it can split thin wood, so drill a pilot hole. When in doubt, hold the fastener against the two pieces and picture where the tip ends up.
Outdoors, coating is everything. A plain steel screw outdoors will rust, stain the wood, and fail. Use hot-dipped galvanized or stainless for anything exposed to weather โ and if you're fastening pressure-treated lumber, use fasteners rated for it, because the treatment eats ordinary coatings.
Nails are sized by "penny" (written as "d") โ a 16d is a common framing nail, an 8d a common all-purpose one. Use finish nails (small heads) for trim so the hole disappears, and galvanized or stainless for anything outside. For most of what a homeowner does, though, a box of coarse-thread wood screws and a box of exterior screws covers a lot of ground.
Picking fasteners for shelves, trim, and repairs is squarely DIY. But structural connections โ anything holding up framing, a deck ledger, a load-bearing beam, stair stringers โ have real code requirements for the fastener type, size, and spacing. Those aren't the place to guess. If your project carries structural load or is a deck attached to the house, that's a job worth doing to code, and we can help.
Structural connections have real code rules for fastener size and spacing. If it holds weight or attaches to the house, let us make sure it's done right.
The small things around a house are exactly what turn into big repairs when they're ignored. With a Home Plan we keep an eye on the whole place on a regular visit and fix the little stuff before it grows, with member savings on repairs and priority scheduling when you need us.
From a one-time fix to a Home Plan that keeps the whole place handled โ we're right here in Columbus.
The Blue Collar Crew, LLC provides home-improvement and repair services in Southern Indiana. The do-it-yourself guidance on this page is general homeowner information for common, non-hazardous tasks โ it is not professional advice and is not a substitute for a licensed trade where one is required. Do not attempt electrical wiring, gas, structural, or in-wall plumbing work yourself. Indiana does not issue a statewide general contractor license; licensed-trade work is performed by Indiana state-licensed plumbers (IC 25-28.5) and locally licensed electricians. For homes built before 1978, work that disturbs paint follows EPA's lead-safe RRP Rule (40 CFR Part 745). Work at your own risk and follow all product and tool safety instructions. A quote request is not a contract; no work is authorized until a separate written agreement complying with IC 24-5-11 is signed. Insured.