|Screw Length||6 in||Size||1/4 in|
|Thread Pitch (mm)||3.5 mm||Threads Per Inch (TPI)||7.25|
|Drive Style||Torx||Fastener Color||Brass|
|Fastener Material||Carbon Steel||Fastener Plating||Zinc|
|Fastener Type||Lag Screws||Features||Self Tapping|
|Grade||Grade 5||Head Style||Washer Head|
|Materials Fastened||Wood to Wood||Measurement Standard||SAE|
|Package Quantity||1||Product Weight (lb.)||.062 lb|
|Manufacturer Warranty||For warranty information on this product, please call the Customer Service Center at 1-800-435-4654.|
A: Hello, Please see engineering values below, values can be found on last page: https://spax.us/uploads/resources/PWLG-TSTAR-WH-YZ-Spec-pg.pdf
A: Hello, We would recommend pre-drilling with 3/16 bit through the ply's but not into the main substrate, which is the 4x4 according to your description. Thanks for being a SPAX customer.
A: Hal... I use Doug Fir every day. Drilling a pilot hole is a choice. I can tell you I drill pilot holes everyday. If I get a split because I I don't drill a pilot hole. I can tell you my customers don't even have to ask. Pilot holes mean a higher quality job. How you build your projects is how you BUILD YOUR REPUTATION. NUFF SAID. Tom in Lubbock, Texas
A: definitly drill a pilot hole
A: this is not a direct answer but I would take some scrap lumber and try several small bits- as well as these screws cut their own holes you will be surprised at how small a pilot you need vs regular lags
A: T-30, I believe.
A: Hello, The 1/4 x 6" T-Star washer head PowerLag uses a T-30 bit. Thank you for being a SPAX customer, The SPAX Team
A: It tells you plainly on the box. T30
A: This uses a T-30 T Star bit
A: Description says T-30.
A: They offer a separate HCR (High Corrosion Resistance) version specifically for treated lumber and exterior use. You could use either one depending on your exact application and expected weather exposure.
A: It's zinc plated, which is corrosion resistant.
A: Yes, the screws can be used outside.
A: Hello, We do not recommend a yellow zinc coated screw for exterior use. When using screws in an exterior application, we recommend a HCR or High Corrosion Resistant coating. In this case where you need a 1/4 x 6" screw we would recommend our HCR coated screw. These screws are available at Home Depot. If you are having trouble locating them, check with the Pro-Desk and reference SKU# 1001-653-754. Thank you for being a SPAX customer, The SPAX Team
A: I was confused about this as well. The Facebook ad specifically shows an outdoor decking application, yet the specs on the Home Depot website indicate that they are for indoor use. I was considering them for my wooden truck flatbed top.