5/16 in. SPAX Washer Head Exterior Lag, HCR, - Choose Your Length

5/16 in. SPAX Washer Head Exterior Lag, HCR, T-Star - Choose Your Size

Goodbye Conventional Lags!

SPAX PowerLags offers the industry's largest selection of code-recognized structural wood-to-wood fasteners. Featuring SPAX patented thread technology, they require no pre-drilling and drive faster and easier than conventional lags and other structural screws

The Torx Recess fastener has been an automotive industry standard for many years.

Torx is a patented brand name for a six-pointed drive pattern developed in 1967 by Camcar Textronic. The Generic name Start Drive is commonly used instead of the Trade Marked Torx to identify the six-lobed drive system. Other companies have branded their particular six-lobbed drive system, like Spax, which 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, starting with a "T-" and ranging 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; 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 wood fibers, ensuring a fast grip. This effectively prevents the material from splitting and reduces the insertion moment. For hardwoods, 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 equals 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.

FEATURES:

• Low-profile, large diameter head design allows for outstanding clamping force and improved aesthetics
• Deep T-Star drive offers excellent bit engagement without requiring a "special" driver bit
• HCR Coating is approved for use in treated lumber
• Code listings ICC-ES No. ESR-1782
• Technical evaluation report 1711-01 deck ledger application
• Heat treated to Grade 5 durability
• Patented thread serrations require up to 40% less driving torque to increase installation speed while helping prevent cracking in logs
• Built-in washer head designs eliminate the need and extra cost of a separate washer

German Designed - Made in USA.