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SPAX PowerLags offer the largest selection of code-recognized structural wood-to-wood fasteners in the industry. Featuring SPAX patented thread technology, they require no pre-drilling, and drive faster and easier than conventional lags and other structural screws
TORX® is a patented brand name for a six-pointed drive pattern developed in 1967 by Camcar Textronic. The Generic name is Start Drive is commonly used instead of the Trade Marked TORX® to identify the six lobed drive system. Other companies have branded their own particular six-lobbed drive system like Spax has a T-Star and T-Star Plus. By design, the six lobbed drive resists Cam-Out better than Phillips (Phillips is designed to Cam-Out to prevent over torquing) and slotted head screws.
Sizes are numbered and all start with a "T-" and range from 1 to 100. Starting with T-1 to T-10 they step up by increments of 1. From T-10 to T-45 they step up in increments of 5 and from T-50 to T100, they step up in increments of 10.
SPAX® T-STAR®: The driving surfaces of the T-STAR force application are arranged in the shape of a star and run vertically, simplifying tool insertion and ensuring a firm grip. This force application shape puts an end to the cam-out effect. The contact force during fastening is reduced to a minimum and high torques can be transmitted to the screw without damaging it or the tool.
SPAX® 4CUT® point: The 4CUT® point enables fastening without pre-drilling (depending on the wood). This is achieved through its special screw tip. The arrow shape pushes through the fibres of the wood, ensuring a fast grip. This effectively prevents the material from splitting and reduces the insertion moment. For hard woods, we recommend pre-drilling even when using SPAX with 4CUT.
Deep Thread: Characterized by a reduced diameter shank resulting in a deep thread profile. A single lead thread, meaning that one revolution advances the screw one pitch. (Pitch is equal to 1 divided by the number of threads per inch. For a screw with 10 threads per in., one revolution will advance the screw 1/1O in. into the wood.)
The deep thread form provides superior resistance to pull-out. This design feature is commonly called a Lo-Root® or Production Screw.
German Designed - Made in USA.
| SIZE (#8, #10 ...) | 3/8 in. |
|---|---|
| LENGTH | 6 in. |
| MATERIAL | Corrosion Resistant Coated |
| COUNTERSINK NIBS | Without Nibs |
| RECESS TYPE | Star / Torx |
| HEAD | Washer |
| POINT TYPE | Self Drilling Wood |
| BRAND | SPAX |
| RECESS SIZE | T-50 |
| QUANTITY | MED (51-150) |
| Color | Black |
| Threaded Length | 3.150 in. |
| Head Diameter | 0.970 in. |
| RoHS Compliant? | No |
| SKU | 3860-LHW-PL |
| SPECS: | |
| Prop 65 | All SPAX® screws, regardless of coating, are in compliance with California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986).
WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood. |
All SPAX® screws, regardless of coating, are in compliance with California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986).

WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood.
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