Choosing construction fasteners anchors for a timber build can be difficult when both options carry closely related structural timber screw names. The important decision is not the shared broad-use language; it is whether the project calls for P1's particular specification or P2's shorter format and defined order quantity. With a listed-price spread of $1,861.90, separating the meaningful distinctions can keep the selection focused on the build requirements.
Quick verdict
Choose the Sandbaggy Structural Timber Screws - Countersunk (Hex Head) - Wood Lock Screw when its named configuration matches a specific project requirement. Choose the 4" Structural Timber Screws - Countersunk (Hex Head) - Sandbaggy when a lower listed price is the leading concern. Both are positioned for timber work, but they are not interchangeable choices on listed length and order scale.
| Comparison point | Wood Lock Screw | 4" Structural Timber Screws |
|---|---|---|
| Listed price | USD 2,058.21 | USD 196.31 |
| Item length | 8 in | 4 in |
| Head style | Hex Head | Hex Head |
Where each option wins
Wood Lock Screw: when stated specifications lead
The Sandbaggy Structural Timber Screws - Countersunk (Hex Head) - Wood Lock Screw is the more targeted choice when a galvanized finish and an Interior/Exterior designation are fixed requirements. Those attributes give this option a defined place in a project specification beyond simply selecting by price. Its 8-inch listed length also establishes it as the longer configuration in this comparison.
4" Structural Timber Screws: when order scale leads
The 4" Structural Timber Screws - Countersunk (Hex Head) - Sandbaggy stands out for its stated unit quantity of 1,000. That concrete count can be useful when the planned work calls for a clearly defined quantity of screws rather than an unspecified order scale. Its 4-inch listed length makes the decision especially straightforward when the plan is built around that dimension.
Product notes
Sandbaggy Structural Timber Screws - Countersunk (Hex Head) - Wood Lock Screw

The Wood Lock Screw version is for projects where the longer named format is the intended fit. Its description calls out a sharp point, aggressive coarse threads, a tapered head for countersinking, and installation with a 5/16-inch hex bit. It is also described for securing rafters, trusses, headers, and stair stringers, with roofing, decking, and framing named as applications. That combination gives shoppers a concrete reason to choose it when those construction details align with the job. The limitation is its USD 2,058.21 listed price, the higher figure in this head-to-head.
4" Structural Timber Screws - Countersunk (Hex Head) - Sandbaggy

The 4" Structural Timber Screws - Countersunk (Hex Head) - Sandbaggy puts the focus on the lower listed cost of USD 196.31. Its description also identifies roofing, decking, and framing work, including rafters, trusses, headers, and stair stringers. The countersunk Hex Head naming keeps the option aligned with a timber-screw profile intended to sit flush through countersinking. Choose this version when the shorter named format fits the plan and the lower listed price matters most. Its limitation is that it is the shorter listed length beside the Wood Lock Screw configuration.
Final choice by use case
Select the Wood Lock Screw for a project that specifically calls for its galvanized finish and Interior/Exterior designation. Select the 4" Structural Timber Screws when the stated 1,000-unit quantity is the better match for the scope of work. The clearest split is specification-driven: P1 emphasizes a longer, designated configuration, while P2 centers the decision on a shorter format and defined order scale.