The best screws for a wood fence depend on the wood, the weather exposure and the joint. Start with GRK Deck Elite for a coated screw explicitly listed for fencing, compare FastenMaster GuardDog when you want a small exterior-screw pack with documented treated-wood compatibility, and consider SPAX 304 stainless steel for cedar or redwood. These are specification-based picks, without claimed installation or corrosion testing.
This shortlist helps you compare screws for wood-to-wood fence-board work. The sizes below identify exact products, not a universal fastening schedule. Confirm the required diameter, length, embedment and corrosion protection for your actual boards and supports. Gate hinges, metal connectors, rail-to-post joints and other load-carrying details need their own specified fasteners and design checks. Do not substitute a deck screw for a connector screw solely because it fits the hole.
Compare the three fence-screw options
| Exact product and pack | Best reason to compare it | Main limitation |
|---|---|---|
| GRK Deck Elite #8 × 2 in., part 30803; 110 screws | Tan corrosion-resistant coating; fencing and pressure-treated wood listed | For cedar/redwood, compare stainless and follow the lumber guidance |
| FastenMaster GuardDog 2 in., FMGD002-75; 75 screws | Coating documented for ACQ, CA-B, cedar and redwood | Corrosion guarantee excludes salt-water applications |
| SPAX 304 stainless #9 × 2 in., 4197000450504; 1 lb box, approximately 125 screws | Stainless option for cedar/redwood and exterior fencing | Match the required length; confirm exposure-specific alloy choice |
1. GRK Deck Elite: a coated option for pressure-treated fencing
GRK expressly lists Deck Elite for fence boards, deck boards and rails, including pressure-treated lumber. The tan coating and T-15 drive make the #8 × 2-inch Handy Pack, part 30803, a straightforward candidate to compare for compatible fence-board work. The manufacturer lists 110 screws in this pack; part 10803 is a different 540-count pack of the same size.
The coating is described as corrosion resistant, but that description is not a promise of suitability for every preservative or exposure. GRK recommends stainless steel for cedar and other listed woods and has separate coastal guidance. Check the lumber supplier’s fastener requirement before choosing the coated version. See Deck Elite sizes and material guidance.
2. FastenMaster GuardDog: a smaller pack with stated wood compatibility
The selected GuardDog is FMGD002-75: a 2-inch screw in a 75-piece box. That smaller count may suit a limited repair when you have already confirmed the correct screw size. FastenMaster describes GuardDog as an exterior wood screw; its sell sheet says the coating is approved for ACQ and CA-B treatments and for acidic woods such as cedar and redwood.
GuardDog uses a TORX ttap drive. FastenMaster says a standard T25 TORX bit can also be used. Its instructions recommend predrilling when working within 1½ inches of a board end or with hardwoods. Follow the product instructions for your assembly; the sell sheet’s deck-to-joist fastener count is not a fence fastening schedule.
The key restriction is exposure: FastenMaster’s corrosion guarantee does not apply to salt-water applications. Its approval for cedar does not override your lumber supplier’s recommendation, including any requirement for stainless fasteners. Compare GuardDog packs and read its coating and installation notes.
3. SPAX 304 stainless steel: our starting choice for cedar and redwood
SPAX lists its T-STARplus Flat Head 304 Stainless Steel screws for exterior fencing and recommends stainless for cedar and redwood to help avoid tannin staining. That is why we would start with this material when comparing fasteners for those woods. The selected item is #9 × 2 inches, SKU 4197000450504, with a T-20+ drive and an included bit.
This is one 1 lb box. The manufacturer and retailer list 125 screws, while the selected box photograph labels the quantity as approximate, so plan around approximately 125 rather than a guaranteed counted pack. Other SPAX products use different alloys, coatings, lengths and pack sizes; match the full SKU.
SPAX 304 stainless #9 × 2-inch screws, 1 lb box (approx. 125)
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Stainless grade still matters near salt water. SPAX advises 304 or 316 stainless within five miles of coastal salt water; GRK separately recommends 316 for its own high-chloride and near-coast applications. Those are manufacturer-specific guidelines, not an interchangeable guarantee. For direct salt exposure or unusually harsh conditions, have the fastener and lumber suppliers confirm the exact alloy and product. See the SPAX 304 product specifications.
What to check before ordering fence screws
Measure actual board and support thickness, and use the fence design or supplier’s required penetration to choose length. Allow for the point and avoid an exposed tip on the other side. A 2-inch screw can be too long or too short in a different assembly. Do not use the pack examples here to set gate, post or rail connection requirements.
Read the lumber treatment label and any required fastener specification. “Exterior” alone does not identify a coating’s compatibility with every preservative. For example, GuardDog documents ACQ and CA-B approval, while SPAX’s selected 304 stainless product lists ground-contact pressure-treated and fire-retardant lumber applications. Check the exact treatment and exposure rather than assuming that all treated wood is equivalent.
Use the correct drive bit and follow the maker’s pilot-hole guidance. A “no pre-drilling” claim should not be read as permission to ignore the wood species and board ends: GuardDog specifies situations for pilot holes, and SPAX explains that its general no-pre-drilling wording refers to softwoods. Confirm the installation instructions for the exact screw.
Calculate the pack quantity from the number of boards and your specified fastening pattern, then allow for normal waste. Do not translate a manufacturer’s deck-coverage figure directly into fence coverage. Counted packs and weight-based boxes are different buying units.
Frequently asked questions
Are ordinary zinc-plated screws enough for an outdoor fence?
Do not assume that a zinc color or coating means exterior suitability. SPAX describes its basic zinc and yellow-zinc coatings as interior products. Choose an exact screw with documented compatibility for the wood treatment and outdoor exposure.
Should I use stainless screws with cedar?
Stainless is the starting point we recommend comparing: SPAX recommends it to help prevent tannin staining, and GRK also recommends stainless for cedar. GuardDog’s manufacturer separately approves its coating for cedar, so follow the actual lumber and fastener requirements rather than treating every coated screw alike.
What screw length is best for fence pickets?
There is no single length for every picket and rail combination. Use the actual thicknesses, required embedment and fence design, and ensure the point will not protrude. The 2-inch sizes in this comparison are clearly identified buying examples, not a structural specification.
