T-STAR plus Flat Head Yellow Zinc, Partial Thread - Multi-Purpose Structural Screws

Base Part #: 419102()

A multi-purpose structural screw with functional qualities that let you drive faster, install easier, and reduce splitting wood. The T-STAR plus Flat Head has a patented MULTIhead that countersinks the screw head flush in wood. The exclusive T-STAR plus Drive offers superior bit engagement to prevent stripping and damaging your screw. Choose a structural screw that performs better than the rest, buy T-STAR plus Flat Head Yellow Zinc, Partial Thread screws in bulk from wholesalers, dealers, and specialty distributers or in project-appropriate package sizes at retail hardware and home improvement stores.


SPAX T-Star plus flat head fasteners with yellow zinc coating are designed for use in multiple material connections often found inside residential buildings. These "work horse" construction fasteners are designed to countersink in wood for a clean-flush finish and provides a quick and easy installation. In addition, they provide long-lasting, "contractor proven" secure connections.

Material and coating

Cold-rolled "carbon steel" wire, heat treated to grade 5 durability and plated with a yellow zinc finish to prevent red rust. "Yellow zinc" is tested and recognized for use in above ground contact pressure treated lumber for interior dry/damp general construction applications (e.g. AWPA UC1-UC2)

SPAX® T-STAR Plus Drive Fastener

  • IRC / IBC Code Compliant DrJ TER No. 2010-02 Construction Screw Properties
  • Heat treated to Grade-5 durability gives our screws greater strength and reduces breakage
  • Patented thread serration technology reduces driving torque to prolong power tool battery life
  • Unique 4CUT™ Point requires no pre-drilling in wood and prevents wood splitting

Whether you’re working with wood, concrete, masonry, sheet metal, or plastic, use SPAX Multi-Purpose Construction Screws for a wide range of interior applications in multiple materials. Request a sample pack of SPAX Multi-Purpose Construction Screws today and build strong connections on the job site.


• 2-by framing connections

• Furring strips to concrete

• Cabinet frames

• Stair treads

• Subflooring attachments

• Hinge installation

• Indoor furniture

• Installing plumbing supports

For CAD documents, please see Technical Documents.

SizeDrive/Bit SizeThreadAvailable Pkg. Options
Retail PaxLarge Retail Pax1 lb. Box3 lb. Box5 lb. BoxIndividualProject PaxContractor PaxMini PailBulk Pail
#8 x 1-1/4"T-20 T-Star PlusPartial2406752500
#8 x 1-1/2"T-20 T-Star PlusPartial1975972500
#8 x 2"T-20 T-Star PlusPartial1614651500
#8 x 2-1/2"T-20 T-Star PlusPartial1333756181500
#9 x 2-1/2"T-20 T-Star PlusPartial1161500
#9 x 3-1/4"T-20 T-Star PlusPartial891500
#10 x 1-1/2"T-20 T-Star PlusPartial1332500
#10 x 2"T-20 T-Star PlusPartial1071500
#10 x 2-1/2"T-20 T-Star PlusPartial872301500
#10 x 3"T-20 T-Star PlusPartial16722003221500
#10 x 3-1/2"T-20 T-Star PlusPartial571701500
#14 x 3-1/2"T-30 T-Star PlusPartial10
#14 x 4"T-30 T-Star PlusPartial81000
#14 x 4-3/4"T-30 T-Star PlusPartial8


For multi-material fasteners used in masonry/concrete, pre-drill a hole at least 1/4" to 1/2" longer than the length of the screw (refer to chart). No anchor required. In sheet metal, no pre-drilling is required up to 24 gauge.

Screw DiameterDrill BitWeight
#6Not recommendedNot recommended