Tag Archives: corrosion resistant

Marine Grade 316 (A4) Stainless Steel Bi-Metal Self-Drilling Screws

EJOT® SUPER-SAPHIR JT6 Self-Drilling Screws

EJOT® SUPER-SAPHIR JT6 self-drilling screws are made from Marine Grade 316 Stainless Steel Bi-Metal. They feature a screw head and threads that are made of 316 stainless steel, providing exceptional corrosion protection and superior ductility. SUPER-SAPHIR JT6 self-drilling screws have a classic drill point and are designed to drill, form the thread and fasten components in one work step. The drill point is made of hardened carbon steel that is welded to the body. This allows JT6 fasteners to drill and tap steel up to 1/2 thick.  EJOT® SUPER-SAPHIR JT6 self-drilling screws are completed by an optional pre-assembled sealing washer.

EJOT® SUPER-SAPHIR Self-Drilling Screws Features

  • High-quality grade 316 stainless steel, ISO group A4, DIN 1.4401
  • High-quality case hardened carbon steel drill point to DIN standard 10666
  • Available with pre-assembled stainless steel EPDM vulcanized sealing washer for a safe seal every time
  • Free spin zone (near the head of the screw) for a reliable positive connection (only side lap screws)
  • Drill point with small dead center prevents misalignment on the component surface

EJOT_SuperSaphirScrewDiagramSUPER-SAPHIR JT6 Self-Drilling Screws

 

New Product Release – *Only Available at Tanner*

Proper Selection of SUPER-SAPHIR JT6 Self-Drilling Screws

To properly select your SUPER-SAPHIR JT6 Self-Drilling Screws, you must take into account the clamping thickness and required drilling performance.EJOT_ClampThicknessDiagram

Clamp Thickness

To calculate the clamp thickness, you take the thickness of the attachment (a) PLUS (+) the strength of the substructure.

The following formula can be used: Clamp Thickness Greater than or Equal to (a) + 6mm.

Drilling PerformanceEJOT_DrillingPerformanceDiagram

The drilling performance is calculated from the thickness of the components to be drilled.

The following formula can be used for Direct Bearing Surface (trapezoidal profile to steel substructure): t = component (tI) + component (tII).

The following formula can be used for Sandwich Panels: t = component (tII).

Get Increased Reliability with Sealing Washers

EJOT recommends using the sealing washers with SUPER-SAPHIR JT6 Self-Drilling Screws that are used in unweathered areas. The risk of damaging the screw joint with improper installation (excessive tightening torque, slightly sloped clamping) is significantly reduced when sealing washers are used. Clamp load and tensile stress, are also limited in the screw when using the sealing washers. The sealing washer will also help eliminate a direct exposure of the joint (protective surface coating damaged by the fastening process) – significantly dropping the risk of operational, hydrogen-induced embrittlement failure.

EJOT_SealingWasherInstallationDiagram

Correctly Install JT6 Self-Drilling Screws with Sealing Washers

When installing SUPER-SAPHIR JT6 Stainless Steel Self-Drilling Screw with Sealing Washers, depth control must be used. Adjustable depth control will prevent the deformation of the sealing washer (washer with elastomer seal). If the sealing washer is properly installed, you may see the rubber seal overlap. But if the metal back of the sealing washer changes from convex to concave, the screw was installed too tight.

slider_EJOTMarineGrade316Screws
EJOT Marine Grade 316 Stainless Steel Bi-Metal Self-Drilling Screws Available Now at Tanner

Corrosion Resistant Construction Fasteners from Elco

Featuring High-Performance Stalgard® Corrosion Resistant Coatings

To meet the needs of the wide range of concrete & masonry applications in corrosive environments, Elco Construction Products has developed Stalgard®, a specialized corrosion resistant coating. Specifically designed for critical fastening applications in concrete & masonry in exposed environments, don’t take any chances, choose Elco fasteners with Stalgard® corrosion resistant coating.

What is Stalgard® CoatingStalgardScrewCircleRoHSLogo

Stalgard® corrosion resistant coatings are durable, multi-layer, coatings that are engineered to provide optimal performance in the most demanding construction applications. These environmentally friendly finishes are free from chromates & silicates and any process, like electroplating, that might induce hydrogen embrittlement & structural failures.

  • Maximizes fastener performance
  • Salt spray corrosion resistance at 1000+ hours with no red rust per ASTM B117
  • Uniform thickness
  • Low coefficient of friction – eliminates the need for post-coating lubricants to ease installation
  • Does not use processes that introduce hydrogen – will not cause brittle failures like those caused by electroplating
  • Durable tough finish – doesn’t come off during handling or repeated installations
  • Eliminates the plating process, resulting in a more environmentally friendly product than those with plated zinc or other finishes
  • RoHS Compliant – chrome-free
  • Clean and dry – no oily residue
  • Maintains drilling and tapping performance
  • Blue, grey, and white Stalgard are ACQ-compatible

What are the Different Types of Stalgard® Corrosion Resistant Coatings

Stalgard®StalgardLogos

  • For Induction Heat-Treated Fasteners
  • Proven, outstanding corrosion resistance for most construction applications, including metal and wood
  • Salt spray resistance: 1000 hours per ASTM B117, 1600 hours over 410 stainless steel
  • Available colors: silver, black, blue, white, yellow, red, gray and brown
  • Pantone gray available for ACQ-treated lumber
  • Maintains drilling and tapping performance

Stalgard® GB

  • Galvanic Barrier Coating
  • Standard on all Elco stainless steel fasteners
  • Prevents a galvanic reaction between the stainless steel and dissimilar application materials, which could lead to fastener and/or joint failure
  • Salt spray corrosion resistance: 1000 hours per ASTM B117
  • Available color: Silver
  • Maintains drilling and tapping performance

Stalgard® SUB

  • Ultimate Barrier Coating
  • For more severely-corrosive environments
  • Salt spray 2,000 hours per ASTM B117
  • Available color: Silver
  • Maintains drilling and tapping performance

Construction Fasteners Featuring Stalgard® Corrosion Resistant Coatings at Tanner

For Metal ApplicationsStalgardScrews

For Aluminum Applications

For Concrete Applications