Product
The Spax T-STAR Plus T20 Black Galvanized Full Thread Wood Screw in 3.5x40mm is a reliable fastening solution designed for wood assembly applications, available in a convenient 200-piece pack.
Specifications
- Drive System: T-STAR Plus T20 recess, engineered for optimal torque transfer and reduced cam-out risk
- Thread: Full thread (TF) design running the entire length of the shank for maximum holding power in wood
- Dimensions: 3.5mm diameter x 40mm length
- Finish: Black galvanized coating providing corrosion resistance for interior and light exterior applications
- Point: SPAX patented 4CUT point for clean penetration without pre-drilling in most softwoods
- Material: Hardened steel with black galvanized surface treatment
- Pack Quantity: 200 screws per box
Usage
Insert the screw using a T20 Torx bit driver. The full thread engages the wood fibers along the entire shank, delivering strong pull-out resistance. Suitable for general carpentry, furniture assembly, decking, and structural wood connections where a secure, flush finish is required.
FAQ
- Do these screws require pre-drilling? In most softwoods, the 4CUT point allows direct driving without pre-drilling. For hardwoods or near edges, pre-drilling is recommended to prevent splitting.
- What driver bit is needed? A T20 T-STAR Plus or standard Torx T20 bit is required for driving these screws.
- Are these screws suitable for outdoor use? The black galvanized finish offers moderate corrosion resistance, making them suitable for covered exterior or interior applications, but not for fully exposed outdoor environments.
- What is the full thread design advantage? The full thread along the entire shank maximizes grip and pull-out strength, particularly useful in thinner materials or end-grain applications.
- Can these screws be used in treated lumber? For chemically treated or preservative-treated lumber, a higher corrosion-resistance coating such as WIROX or stainless steel is generally recommended over standard black galvanized.
mvm-dt-2026-03
