T-STAR plus Flat Head HCR-X™, Partial Thread - Exterior Screws

A powerful exterior deck screw with proprietary HCR-X coating, is the fastener of choice for contractors working with treated lumber. The T-STAR plus Flat Head HCR-X, Partial Thread screw is ideal for overhead work and is available for both interior and exterior use. Choose the best screws for treated lumber and decking buy T-STAR plus Flat Head, Partial Thread fasteners in bulk from wholesalers, dealers, and specialty distributers or in project-appropriate package sizes at retail hardware and home improvement stores.
#14 x 1", 1-1/4", 1-1/2" and 2" lengths utilize a standard (full) thread design
DESCRiption
SPAX® T-STAR plus Flat Head fasteners with HCR-X™ coating are designed for use in multiple material connections often found outside residential domains. These “work horse” construction fasteners are designed to countersink in treated lumber for a clean-flush finish and provides a quick and easy installation. In addition, they provide long-lasting, “contractor proven” secure connections.
Material & Coating
Cold-rolled “carbon steel” wire, heat treated to grade 5 durability and plated with a HCR-X™ finish to prevent red rust. “HCR-X™” is tested and recognized for use in ground contact pressure treated lumber for exterior, freshwater general construction applications (e.g. AWPA UC1- UC4A, UCFA). SPAX® recommends stainless steel for cedar and redwood attachment applications.
SPAX® Patented MULTIHead Screw
The T-STAR plus Flat Head screw features ribs on the underside of the head that facilitate a clean, flush, or countersunk finish in wood and acts as a break against metal hardware to prevent stripping out.
- IRC / IBC Code Compliant DrJ TER No. 2010-02 Construction Screw Properties
- Heat treated to Grade-5 durability
- Patented thread serrations reduce driving torque to prolong power tool battery life
- Unique 4CUT™ Point prevents splitting and requires no pre-drilling in wood
- Superior bit fit to eliminate camming out
Whether you’re working with wood, concrete, masonry, sheet metal, plastic, or treated lumber, use SPAX Multi-Purpose Construction Screws on multiple materials.
Request a sample pack of SPAX Multi-Purpose Construction Screws today and build strong connections on the job site.

TYPICAL EXTERIOR APPLICATIONS
• 2-by framing connections - treated lumber
• Deck board finishing installation
• Deck railing 2x2 baulster
• Stair treads - treated lumber deck
• Exterior fencing
• Shed construction
• Outdoor furniture
For CAD documents, please see Technical Documents.
Size | Drive/Bit Size | Thread | Available Pkg. Options | |||||||||
Retail Pax | Large Retail Pax | 1 lb. Box | 3 lb. Box | 5 lb. Box | Individual | Project Pax | Contractor Pax | Mini Pail | Bulk Pail | |||
#8 x 1-1/4" | T-20 T-Star Plus | Partial | 230 | 1150 | 2500 | |||||||
#8 x 1-1/2" | T-20 T-Star Plus | Partial | 25 | 195 | 550 | 975 | 2500 | |||||
#8 x 2" | T-20 T-Star Plus | Partial | 154 | 465 | 770 | 1500 | ||||||
#8 x 2-1/2" | T-20 T-Star Plus | Partial | 124 | 375 | 1500 | |||||||
#9 x 2-1/2" | T-20 T-Star Plus | Partial | 109 | 310 | 1500 | |||||||
#9 x 3-1/4" | T-20 T-Star Plus | Partial | 83 | 245 | 1500 | |||||||
#10 x 1-1/2" | T-20 T-Star Plus | Partial | 125 | 625 | 2500 | |||||||
#10 x 2" | T-20 T-Star Plus | Partial | 99 | 277 | 474 | 1500 | ||||||
#10 x 2-1/2" | T-20 T-Star Plus | Partial | 81 | 235 | 388 | 1500 | ||||||
#10 x 3" | T-20 T-Star Plus | Partial | 16 | 67 | 200 | 335 | 225 | 1500 | ||||
#10 x 3-1/2" | T-20 T-Star Plus | Partial | 59 | 177 | 1500 | |||||||
#14 x 1" | T-30 T-Star Plus | Standard | 115 | 1500 | ||||||||
#14 x 1-1/4" | T-30 T-Star Plus | Standard | 97 | 1500 | ||||||||
#14 x 1-1/2" | T-30 T-Star Plus | Standard | 90 | 1500 | ||||||||
#14 x 2" | T-30 T-Star Plus | Standard | 65 | 1500 | ||||||||
#14 x 2-1/2" | T-30 T-Star Plus | Partial | 55 | 1000 | ||||||||
#14 x 3" | T-30 T-Star Plus | Partial | 10 | 50 | 1000 | |||||||
#14 x 3-1/2" | T-30 T-Star Plus | Partial | 10 | 50 | 1000 | |||||||
#14 x 4" | T-30 T-Star Plus | Partial | 8 | 50 | 1000 | |||||||
#14 x 4-3/4" | T-30 T-Star Plus | Partial | 8 | 50 | 750 |
MASONRY & CONCRETE PRE-DRILL SPECIFICATIONS 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 Diameter | Drill Bit | Weight |
---|---|---|
#6 | Not recommended | Not recommended |
#8/9 | 1/8" | Light |
#10 | 5/32" | Medium |
#14 | 3/16" | Medium |



















