Tag Archives: concrete & masonry

Stainless Steel Threaded Concrete Anchors by Elco®

The Only Choice for Concrete & Masonry Applications in Highly Corrosive Environments

Elco® Construction Products help provide improved building integrity, ensure strength, and can perform even in the most demanding environments. To meet the needs of the wide range of concrete and masonry applications in corrosive environments, Elco® offers three different stainless steel concrete and masonry anchors:

Read on to learn more about the features and benefits of using these concrete and masonry anchors.


Aggre-Gator® Bi-Metal Fasteners

The Corrosion Resistance of 300 Series Stainless Steel in a Threaded Concrete Anchor

Aggre-Gator® Bi-Metal Threaded Concrete Anchors are made from 300 series (18-8) stainless steel alloy, providing an unmatched corrosion resistance for your toughest applications. The Silver Stalgard® GB Coating protects aluminum components from accelerated corrosion when it comes in contact with 300 series stainless steel. The gimlet point of the Aggre-Gator® fasteners allow for quick starts and make them an ideal anchor for treated, wood-to-wood applications. When working with block and concrete, the fused and hardened steel tapping threads make installation easy and provide a tight hold into the material.

  • Bi-metal technology – 300 (18-8) stainless steel head and shankaggregator-screws
  • Fused and hardened steel tapping threads and a gimlet point
  • Alternating, hi-low notched thread profile
  • Silver-colored Stalgard GB coating
  • Hex washer head and TrimFit® flat head designs
  • Outstanding corrosion resistance
  • Long service life
  • High strength and ductility
  • Offers greater galvanic compatibility in dissimilar metal applications involving aluminum
  • Thread profile provides quick cutting and stability during installations
  • High in-place value over the life of structures
  • Exposed anchoring/coastal/wet areas
  • Aluminum enclosures
  • Hurricane shutters/windows/awnings/thresholds
  • Curtain wall & window wall support anchors
  • Stone facade support anchors
  • ACQ-treated wood

UltraCon® SS4 Threaded Masonry Anchorsultracon-ss4-logo

410 Stainless Steel with Stalgard® Coating for Excellent Corrosion Resistance

UltraCon® SS4 Masonry Anchors combine the proven strength and performance of UltraCon® anchors with the outstanding corrosion resistance of Stalgard® Coating over 410 stainless steel. UltraCon® SS4 Masonry Anchors are the ideal choice for jobs involving highly corrosive environments. In a Pull-Out Test in 4.4 KSI Concrete, full embedment 2″, the Ultracon® SS4 Anchors far outperformed the ITW’s 410 SS Tapcon® Anchors.salt-test

  • UltraCon® SS4 – 3,294 lbs. Pull Out Value
  • ITW 410 SS Tapcon® – 2,666 lbs. Pull Out Value

UltraCon SS4 Anchors and ITW’s 410 Stainless Steel Tapcon Anchors were put to the test and subjected to 1,500 hours of salt spray testing (per ASTM B117). Typical results from the salt spray testing can be seen in the samples shown to the right. As you can see the UltraCon SS4 Anchors show no signs of red rust even after 1,500 hours of salt spray testing.

Features and Benefits:ultracon-ss4-screw
  • 410 stainless steel
  • 1/4″ diameter
  • Installs with standard 3/16″ masonry drill bit
  • 1-1/4″ to 4″ lengths
  • Hex washer and Phillips TrimFit® flat heads
  • V-notched twin-lead threads
  • Gimlet point
  • Silver Stalgard® coating provides 1600 hours of salt spray protection per ASTM B117
  • Miami-Dade Florida NOA pending

Crete-Flex® SS4 Masonry Fastenerscrete-flex-logo

Extraordinary Strength and Fastener Performance

Crete-Flex® SS4 Masonry Fastening System is a family of high performance 410 stainless steel masonry anchors. These anchors deliver corrosion resistance, installation consistency, and outstanding performance when working with concrete and hollow block.

Engineering Technology

Oversized Threads: #14 diameter Crete-Flex® Anchors have a .268″ O.D. and .201″ I.D. These root diameters are much larger than standard concrete anchors and help provide exceptional performance, including higher shear values.
Unique Thread Design: Crete-Flex® are made with resilient 40º threads to help enhance thread engagement and “V” notches for efficient tapping. These 2 features help provide exceptional mechanical strengths.

Superior Corrosion Resistance

Special Heat Treatment: Heat treatment is necessary for added corrosion resistance and tapping into the concrete. Typically 410 stainless steel fasteners are case hardened, but this can adversely impact the fastener’s ductility and corrosion resistance. Due to this Crete-Flex® Anchors get a special heat treatment to help allow the 410 stainless steel to retain more of its natural corrosion resistance and ductility.
Unique Finish: Crete-Flex® Anchors all receive Elco’s unequaled Stalgard® coating. In combination with the special heat treatment, Crete-Flex® Anchors boast superior corrosion resistance. Crete-Flex® Anchors showed no signs of red rust, even after 1,600 hours in a salt spray cabinet (per ASTM B117).

  • 410 stainless steel
  • Oversized #14 diametercrete-flex-screw
    • Shank (unthreaded section): .214″
    • Major thread diameter (O.D.): .268″
    • Minor thread diameter (I.D.): .201″
  • Heavy-duty, V-notched thread with larger cross-sectional area (25% greater than other commonly-used masonry fasteners)
  • Hex washer, flat, hex flange and TrimFit® flat heads available
  • Gimlet point
  • Special heat treatment
  • Silver Stalgard corrosion-resistant finish provides 1600 hours of salt spray resistance
  • Made in the U.S.A.
  • Installed with a 7/32″ carbide-tipped masonry drill bit
  • Exceptionally high shear values and pull out values
  • Enhanced corrosion resistance
  • Easy and consistent installation

Chuck Systems & Drill Bit Shanks for Rotary Hammer Drills

Selecting the Correct Shank Type for Your Rotary Hammer Drill

When working with a rotary hammer drill, one of the most important things to consider is the type of chuck system your drill has. Knowing the chuck system of your drill is important because this determines the diameter of the drill bit shank, as well as the types of grooves that interlock the drill bit into the chuck of the drill. There are three major chuck / drill bit shank types available: SDS & SDS-Plus, SDS Max, and Spline. SDS and SDS-Plus shank types are completely interchangeable. The diameter of the shank and types of grooves will remain the same for each of these shank types regardless of the diameter, length, or other features the drill bit may have. Read on to learn more about each of these different chuck / shank types available to you.

SDS & SDS-Plus Shanks

SDS chuck systems were specially designed for concrete and masonry hammering. The flat end of the drill bit is the only part the piston will hit, which makes its energy usage more efficient and effective. One of the most convenient features of the SDS system is the ability to change the drill bit with only one hand. SDS chucks have spring-loaded balls designed to fit and lock into the grooves of the SDS shanks. After inserting the bit into the chuck, a simple twist will allow those spring loaded balls to snap into place and hold the bit. In German markets, SDS stands for “Steck, Dreh, Sitz” (Insert, Twist, Stay). The SDS-Plus shank came along when improvements were made to the original design, the SDS-Plus system allows the shank to be held in place more firmly. SDS-Plus shanks have four indentations on them: two open-ended and two close-ended, these keep the bit from coming loose from the chuck.

  • SDS and SDS-Plus shank types are completely interchangeableSDS & SDS-Plus Drill Bits
  • Typically used with Carbide Drill Bits 5/32” – 1-1/8”
  • Thin wall Carbide Core Bits up to 4”
  • SDS-Plus systems are the most common since they’re adapted for relatively less-heavy drilling
  • SDS & SDS-Plus shanks have a diameter of 10mm

SDS-Max Shanks

The SDS-Max chuck system was initially designed to replace the Spline drive for larger bits, but improved connectivity similar to the SDS & SDS-Plus systems. The SDS Max system allows the piston to travel farther and in turn, allows the piston to hit the bit harder and the bit cuts more efficiently. The SDS Max system was designed for heavier-duty work than the SDS-Plus system. SDS Max bit shanks have five indentations on them: three open-ended and two close-ended, these keep the bit from coming loose from the chuck.

  • SDS Max bits are only compatible in SDS Max chuck systemsSDS Max Drill Bits
  • SDS Max bit sizes lean more toward the larger end of masonry drill bits
  • Typically used with Carbide Drill Bits 1/2” – 2”
  • Thick wall Carbide Core Bits up to 4” (thin wall up to 6”)
  • SDS Max system is the newest  and overall best system for the heaviest masonry drilling out there
  • SDS Max shanks have a diameter of 18mm

Spline Shanks

Spline chuck systems are designed for the heaviest drilling workloads, like the SDS Max system, but the Spline is just an older system. The Spline shank has 12 “teeth” or splines that fit into the chuck and is held in place by a retaining pin. These shanks are held to an exact tolerance to assure a perfect fit. Despite the advantages the SDS Max system may have over the Spline drive, many users still prefer to use it. The primary advantage the Spline shank offers is its maximum drilling torque.

  • Spline drive bits are only compatible in Spline drive chuck systemsSpline Drill Bits
  • Typically used with Carbide Drill Bits 1/2” – 2”
  • Thick wall Carbide Core Bits up to 4” (thin wall up to 6”)
  • There are also a number of chipping, chiseling, bushing, cutting and digging bits available
  • Spline shanks have a diameter of 19mm